Floristic Quality Assessment - Coefficient of Conservatism

Coefficient of Conservatism (C) values are the key component of the Floristic Quality Index, a tool used to assess the quality of natural communities. C values range from 0 to 10 and are based on two factors: 1) plants have various degrees of fidelity to specific habitats and their quality, and 2) plants have varying tolerances to disturbances and respond in various degrees. Comments or questions regarding C values for Maine or the list should be directed to Don Cameron (don.s.cameron@maine.gov).

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Scientific Name Common Name Nativity Coefficient of Conservatism Coefficient of Wetness
Abies balsamea balsam fir native 3 0
Abies concolor white fir non-native 0  
Abutilon theophrasti velvetleaf non-native 0 3
Acalypha rhomboidea common threeseed mercury native 2 3
Acer ginnala Amur maple non-native 0  
Acer negundo boxelder non-native 0 0
Acer pensylvanicum striped maple native 5 3
Acer platanoides Norway maple non-native 0 5
Acer pseudoplatanus sycamore maple non-native 0  
Acer rubrum red maple native 2 0
Acer saccharinum silver maple native 6 -3
Acer saccharum sugar maple native 5 3
Acer spicatum mountain maple native 6 3
Acer x freemanii red maple x silver maple native 2 0
Achillea millefolium common yarrow non-native 0 3
Achillea millefolium var. borealis common yarrow non-native 0 3
Achillea millefolium var. millefolium common yarrow non-native 0 3
Achillea millefolium var. occidentalis common yarrow non-native 0 3
Achillea ptarmica sneezeweed non-native 0 3
Acinos arvensis basil thyme non-native 0  
Aconitum napellus Venus' chariot non-native 0  
Acorus americanus sweetflag native 6 -5
Acorus calamus calamus native 6 -5
Actaea pachypoda white baneberry native 7 5
Actaea racemosa black baneberry non-native 0  
Actaea rubra red baneberry native 7 3
Actinidia arguta tara vine non-native 0  
Adiantum aleuticum Aleutian maidenhair native 9 3
Adiantum pedatum northern maidenhair native 8 3
Adlumia fungosa allegheny vine native 7  
Aegopodium podagraria bishop's goutweed non-native 0 0
Aesculus glabra Ohio buckeye non-native 0 0
Aesculus hippocastanum horse chestnut non-native 0  
Aethusa cynapium fool's parsley non-native 0  
Agalinis maritima saltmarsh false foxglove native 7 -3
Agalinis neoscotica Nova Scotia false foxglove native 8 -3
Agalinis paupercula smallflower false foxglove native 4 -5
Agalinis tenuifolia slenderleaf false foxglove native 4 -3
Ageratina altissima white snakeroot native 6 3
Agrimonia gryposepala tall hairy agrimony native 4 3
Agrimonia striata roadside agrimony native 4 3
Agropyron pungens tick quackgrass non-native 0  
Agrostemma githago common corncockle non-native 0  
Agrostis canina velvet bentgrass native 3 5
Agrostis capillaris colonial bentgrass non-native 0 0
Agrostis elliottiana Elliot's bentgrass non-native 0 3
Agrostis gigantea redtop non-native 0 -3
Agrostis hyemalis winter bentgrass native 4 0
Agrostis mertensii northern bentgrass native 9 3
Agrostis perennans upland bentgrass native 3 3
Agrostis scabra rough bentgrass native 2 0
Agrostis stolonifera creeping bentgrass non-native 0 -3
Agrostis tenuis colonial bentgrass non-native 0  
Ailanthus altissima tree of heaven non-native 0 5
Ajuga genevensis blue bugle non-native 0  
Ajuga reptans common bugle non-native 0  
Alchemilla xanthochlora hairy lady's mantle non-native 0  
Alisma subcordatum American water plantain native 4 -5
Alisma triviale northern water plantain native 4 -5
Alliaria petiolata garlic mustard non-native 0 3
Allium ×proliferum garden onion non-native 0  
Allium canadense meadow garlic native 7 3
Allium cepa garden onion non-native 0  
Allium schoenoprasum var. sibiricum wild chives native 7 3
Allium tricoccum ramp native 8 3
Allium vineale wild garlic non-native 0 3
Alnus glutinosa European alder non-native 0 -3
Alnus incana ssp. rugosa speckled alder native 2 -3
Alnus serrulata hazel alder native 5 -5
Alnus viridis ssp. crispa mountain alder native 4 0
Alopecurus aequalis shortawn foxtail native 6 -5
Alopecurus geniculatus water foxtail non-native 0 -5
Alopecurus myosuroides slender meadow foxtail non-native 0 -3
Alopecurus pratensis meadow foxtail non-native 0 0
Alyssum alyssoides pale madwort non-native 0  
Amaranthus albus prostrate pigweed non-native 0 3
Amaranthus blitoides mat amaranth non-native 0 3
Amaranthus cannabinus tidalmarsh amaranth native 7 -5
Amaranthus caudatus love-lies-bleeding non-native 0  
Amaranthus cruentus red amaranth non-native 0  
Amaranthus hybridus slim amaranth non-native 0  
Amaranthus powellii Powell's amaranth non-native 0  
Amaranthus retroflexus redroot amaranth non-native 0 3
Amaranthus spinosus spiny amaranth non-native 0 3
Amaranthus tuberculatus roughfruit amaranth non-native 0 -5
Ambrosia artemisiifolia annual ragweed native 2 3
Ambrosia psilostachya Cuman ragweed non-native 0 0
Ambrosia trifida great ragweed native 2 0
Amelanchier arborea common serviceberry native 5 3
Amelanchier bartramiana oblongfruit serviceberry native 6 0
Amelanchier canadensis Canadian serviceberry native 5 0
Amelanchier laevis Allegheny serviceberry native 3  
Amelanchier nantucketensis Nantucket serviceberry native 4 3
Amelanchier sanguinea roundleaf serviceberry native 5  
Amelanchier sanguinea var. gaspensis Gaspé serviceberry native 7  
Amelanchier spicata low serviceberry native 4 3
Amelanchier stolonifera low serviceberry native 4  
Amelanchier x intermedia intermediate serviceberry native 4  
Amerorchis rotundifolia roundleaf orchid native 10 -5
Ammophila breviligulata American beachgrass native 6 5
Amorpha fruticosa desert false indigo non-native 0 -3
Amphicarpaea bracteata American hogpeanut native 5 0
Amsinckia douglasiana Douglas' fiddleneck non-native 0  
Amsinckia menziesii Menzies' fiddleneck non-native 0  
Anagallis arvensis scarlet pimpernel non-native 0  
Anagallis arvensis ssp. arvensis scarlet pimpernel non-native 0  
Anagallis arvensis ssp. foemina poorman's weatherglass non-native 0  
Anaphalis margaritacea western pearly everlasting native 2 3
Anchusa arvensis small bugloss non-native 0  
Anchusa officinalis common bugloss non-native 0  
Andromeda polifolia var. glaucophylla bog rosemary native 8 -5
Andropogon gerardii big bluestem native 3 3
Anemone americana round leaf hepatica native 7 -3
Anemone canadensis Canadian anemone native 5 -3
Anemone cylindrica candle anemone native 6  
Anemone multifida Pacific anemone native 9  
Anemone quinquefolia wood anemone native 6 3
Anemone virginiana tall thimbleweed native 6 3
Anethum graveolens dill non-native 0  
Angelica atropurpurea purplestem angelica native 5 -5
Angelica lucida seacoast angelica native 5 0
Antennaria howellii Howell's pussytoes native 2  
Antennaria howellii ssp. canadensis Canadian pussytoes native 2  
Antennaria howellii ssp. neodioica Howell's pussytoes native 2  
Antennaria howellii ssp. petaloidea small pussytoes native 2  
Antennaria neglecta field pussytoes native 2 5
Antennaria parlinii Parlin's pussytoes native 2  
Antennaria parlinii ssp. fallax Parlin's pussytoes native 2  
Antennaria parlinii ssp. parlinii Parlin's pussytoes native 2  
Antennaria plantaginifolia woman's tobacco native 5  
Anthemis arvensis corn chamomile non-native 0  
Anthemis cotula stinking chamomile non-native 0 3
Anthemis tinctoria golden chamomile non-native 0  
Anthoxanthum aristatum annual vernalgrass non-native 0  
Anthoxanthum monticola alpine sweetgrass native 9  
Anthoxanthum odoratum sweet vernalgrass non-native 0 3
Anthoxanthum ovatum Small sweet grass non-native 0  
Anthriscus sylvestris wild chervil non-native 0  
Apera interrupta dense silkybent non-native 0  
Apera spica-venti loose silkybent non-native 0  
Apios americana groundnut native 4 -3
Apocynum androsaemifolium spreading dogbane native 3 5
Apocynum cannabinum Indianhemp native 3 0
Aquilegia canadensis red columbine native 7 3
Aquilegia vulgaris European columbine non-native 0  
Arabidopsis thaliana mouseear cress non-native 0  
Arabis drummondii Drummond's rockcress native 7  
Arabis glabra tower rockcress native 2  
Arabis hirsuta hairy rockcress native 6 3
Arabis laevigata smooth rockcress native 8  
Arabis missouriensis green rockcress native 8  
Aralia hispida bristly sarsaparilla native 5  
Aralia nudicaulis wild sarsaparilla native 4 3
Aralia racemosa American spikenard native 6 3
Aralia spinosa devil's walkingstick non-native 0 0
Arceuthobium pusillum eastern dwarf mistletoe native 6  
Arctium lappa greater burdock non-native 0  
Arctium minus lesser burdock non-native 0 3
Arctium tomentosum woolly burdock non-native 0  
Arctium vulgare greater burdock non-native 0  
Arctostaphylos alpina alpine bearberry native 10 0
Arctostaphylos uva-ursi kinnikinnick native 6 5
Arenaria serpyllifolia thymeleaf sandwort non-native 0 0
Arethusa bulbosa dragon's mouth native 8 -5
Argentina anserina silverweed cinquefoil native 3 -3
Argentina egedii Pacific silverweed native 6  
Arisaema triphyllum Jack in the pulpit native 6 0
Aristida basiramea forked threeawn native 2  
Aristida dichotoma churchmouse threeawn native 2 3
Aristida oligantha prairie threeawn non-native 0  
Aristolochia macrophylla pipevine non-native 0  
Armoracia rusticana horseradish non-native 0  
Arnica lanceolata lanceleaf arnica native 9 0
Arnoseris minima lamb succory non-native 0  
Aronia melanocarpa black chokeberry native 5 0
Arrhenatherum elatius tall oatgrass non-native 0 3
Arrhenatherum elatius var. elatius tall oatgrass non-native 0 3
Artemisia abrotanum southernwood non-native 0  
Artemisia absinthium absinthium non-native 0  
Artemisia annua sweet sagewort non-native 0 3
Artemisia biennis biennial wormwood non-native 0 -3
Artemisia biennis var. biennis biennial wormwood non-native 0 -3
Artemisia campestris ssp. canadensis field wormwood native 8 5
Artemisia campestris ssp. caudata field sagewort native 7 5
Artemisia ludoviciana white sagebrush non-native 0 5
Artemisia ludoviciana ssp. Ludoviciana white sagebrush non-native 0 5
Artemisia pontica Roman wormwood non-native 0  
Artemisia stelleriana oldwoman non-native 0 3
Artemisia vulgaris common wormwood non-native 0 5
Aruncus dioicus bride's feathers non-native 0 3
Aruncus dioicus var. dioicus bride's feathers non-native 0 3
Aruncus dioicus var. vulgaris bride's feathers non-native 0 3
Asarum canadense Canadian wildginger native 7 5
Asclepias exaltata poke milkweed native 5 5
Asclepias incarnata swamp milkweed native 4 -5
Asclepias incarnata ssp. incarnata swamp milkweed native 4 -5
Asclepias incarnata ssp. Pulchra swamp milkweed native 4 -5
Asclepias syriaca common milkweed native 2 5
Asparagus asparagus non-native 0  
Asparagus officinalis garden asparagus non-native 0 3
Asplenium platyneuron ebony spleenwort native 8 3
Asplenium trichomanes maidenhair spleenwort native 8 5
Asplenium trichomanes-ramosum brightgreen spleenwort native 10 5
Astragalus alpinus alpine milkvetch native 9 0
Astragalus alpinus var. brunetianus alpine milkvetch native 9 0
Astragalus robbinsii var. minor Robbins' milkvetch native 8 5
Athyrium filix-femina common ladyfern native 3 0
Atriplex glabriuscula Scotland orache native 7 3
Atriplex glabriuscula var. acadiensis maritime saltbush native 7 3
Atriplex littoralis grassleaf orache non-native 0  
Atriplex patula spear saltbush non-native 0 -3
Atriplex prostrata triangle orache non-native 0 0
Atriplex subspicata saline saltbush native 7 -3
Aureolaria flava smooth yellow false foxglove native 4  
Aureolaria pedicularia fernleaf yellow false foxglove native 5  
Avena fatua wild oat non-native 0  
Avena sativa common oat non-native 0 5
Axyris amaranthoides Russian pigweed non-native 0  
Balsamita major costmary non-native 0  
Barbarea verna early yellowrocket non-native 0  
Barbarea vulgaris garden yellowrocket non-native 0 0
Bartonia paniculata twining screwstem native 8 -5
Bartonia paniculata ssp. iodandra twining screwstem native 8 -5
Bartonia paniculata ssp. paniculata twining screwstem native 8 -5
Bartonia virginica yellow screwstem native 5 -3
Bassia hyssopifolia fivehorn smotherweed non-native 0 -3
Bassia scoparia burningbush non-native 0 3
Beckmannia syzigachne American sloughgrass non-native 0 -5
Bellis perennis lawndaisy non-native 0  
Berberis thunbergii Japanese barberry non-native 0 3
Berberis vulgaris common barberry non-native 0 3
Berteroa incana hoary alyssum non-native 0  
Beta vulgaris common beet non-native 0  
Betula alba downy birch non-native 0  
Betula alleghaniensis yellow birch native 5 0
Betula glandulosa dwarf birch native 9 -5
Betula lenta sweet birch native 5 3
Betula minor dwarf white birch native 9  
Betula nana dwarf birch native 9 0
Betula papyrifera paper birch native 3 3
Betula papyrifera var. cordifolia mountain paper birch native 6 3
Betula papyrifera var. papyrifera paper birch native 2 3
Betula pendula European white birch non-native 0 3
Betula platyphylla Asian white birch non-native 0  
Betula populifolia gray birch native 2 0
Betula pubescens downy birch non-native 0 -3
Betula pubescens ssp. pubescens downy birch non-native 0 -3
Betula pumila bog birch native 7 -5
Betula x caerulea blue birch native 6  
Bidens aristosa bearded beggarticks native 2 -3
Bidens beckii Beck's water-marigold native 6 -5
Bidens cernua nodding beggartick non-native 0 -5
Bidens connata purplestem beggarticks native 3 -3
Bidens discoidea small beggarticks native 4 -3
Bidens eatonii Eaton's beggarticks native 6 -5
Bidens frondosa devil's beggartick native 2 -3
Bidens hyperborea estuary beggarticks native 6 -5
Bidens tripartita threelobe beggarticks non-native 0 -3
Bidens vulgata big devils beggartick native 2 0
Boehmeria cylindrica smallspike false nettle native 5 -5
Borago officinalis common borage non-native 0  
Botrychium dissectum cutleaf grapefern native 4  
Botrychium lanceolatum lanceleaf grapefern native 5 -3
Botrychium lunaria common moonwort native 4 -3
Botrychium matricariifolium matricary grapefern native 5 3
Botrychium multifidum leathery grapefern native 4  
Botrychium oneidense bluntlobe grapefern native 4  
Botrychium simplex little grapefern native 3 0
Botrychium virginianum rattlesnake fern native 7  
Bouteloua curtipendula sideoats grama non-native 0  
Bouteloua gracilis blue grama non-native 0  
Bouteloua radicosa purple grama non-native 0  
Bouteloua simplex matted grama non-native 0  
Brachyelytrum aristosum northern shorthusk native 6 3
Brachyelytrum septentrionale northern shorthusk native 5 3
Brasenia schreberi watershield native 6 -5
Brassica juncea India mustard non-native 0 5
Brassica napus rape non-native 0  
Brassica nigra black mustard non-native 0  
Brassica rapa field mustard non-native 0 5
Briza media perennial quakinggrass non-native 0 0
Bromus arvensis field brome non-native 0 3
Bromus ciliatus fringed brome native 5 -3
Bromus commutatus bald brome non-native 0  
Bromus erectus erect brome non-native 0  
Bromus hordeaceus soft brome non-native 0 5
Bromus hordeaceus ssp. hordeaceus soft brome non-native 0 5
Bromus inermis smooth brome non-native 0 5
Bromus japonicus field brome non-native 0  
Bromus kalmii arctic brome native 7 0
Bromus latiglumis earlyleaf brome native 6 -3
Bromus marginatus mountain brome non-native 0  
Bromus pubescens hairy woodland brome native 7 3
Bromus racemosus bald brome non-native 0  
Bromus secalinus var. secalinus rye brome non-native 0  
Bromus tectorum cheatgrass non-native 0  
Buglossoides arvensis corn gromwell non-native 0  
Bulbostylis capillaris densetuft hairsedge native 2 3
Butomus umbellatus flowering rush non-native 0 -5
Cakile edentula American searocket native 7 3
Calamagrostis canadensis bluejoint native 2 -5
Calamagrostis cinnoides bluejoint native 3 -5
Calamagrostis pickeringii Pickering's reedgrass native 5 -3
Calamagrostis stricta ssp. inexpansa northern reedgrass native 8 -3
Calamagrostis stricta ssp. stricta slimstem reedgrass native 8 -3
Calamagrostis stricta ssp. stricta var. stricta slimstem reedgrass native 8 -3
Calla palustris water arum native 6 -5
Callistephus chinensis China aster non-native 0  
Callitriche heterophylla twoheaded water-starwort native 4 -5
Callitriche palustris vernal water-starwort native 4 -5
Callitriche terrestris terrestrial water-starwort native 4 -3
Calluna vulgaris heather non-native 0 0
Calopogon tuberosus tuberous grasspink native 5 -5
Caltha palustris yellow marsh marigold native 6 -5
Calypso bulbosa fairy slipper native 8 -3
Calystegia hederacea Japanese false bindweed non-native 0  
Calystegia pellita Japanese false bindweed non-native 0  
Calystegia sepium hedge false bindweed native 2 0
Calystegia sepium ssp. angulata hedge false bindweed native 2 0
Calystegia sepium ssp. appalachiana Appalachia false bindweed native 2 0
Calystegia spithamaea low false bindweed native 4  
Camelina microcarpa littlepod false flax non-native 0 5
Camelina sativa gold-of-pleasure non-native 0 3
Campanula aparinoides marsh bellflower native 5 -5
Campanula bononiensis European bellflower non-native 0  
Campanula glomerata Dane's blood non-native 0  
Campanula latifolia giant bellflower non-native 0  
Campanula rapunculoides rampion bellflower non-native 0  
Campanula rotundifolia bluebell bellflower native 5 3
Campanula trachelium bats in the belfry non-native 0  
Cannabis sativa marijuana non-native 0 3
Capsella bursa-pastoris shepherd's purse non-native 0 3
Caragana arborescens Siberian peashrub non-native 0  
Cardamine bellidifolia alpine bittercress native 10 -3
Cardamine concatenata cutleaf toothwort native 8 3
Cardamine diphylla crinkleroot native 6 3
Cardamine impatiens narrowleaf bittercress non-native 0 0
Cardamine longii Long's bittercress native 8 -5
Cardamine maxima large toothwort native 6 3
Cardamine parviflora sand bittercress native 4 0
Cardamine parviflora var. arenicola sand bittercress native 4 0
Cardamine pensylvanica Pennsylvania bittercress native 5 -3
Cardamine pratensis cuckoo flower non-native 1  
Cardaria draba whitetop non-native 0  
Carduus acanthoides spiny plumeless thistle non-native 0  
Carduus crispus curly plumeless thistle non-native 0  
Carex × stenolepis UNK native 8 0
Carex adusta lesser brown sedge native 3  
Carex albicans Peck's sedge native 5 5
Carex albicans var. albicans whitetinge sedge native 5 5
Carex albicans var. emmonsii Emmons' sedge native 5 5
Carex alopecoidea foxtail sedge native 8 -3
Carex annectens yellowfruit sedge native 2 -3
Carex appalachica Appalachian sedge native 6  
Carex aquatilis water sedge native 6 -5
Carex arcta northern cluster sedge native 6 -5
Carex arctata drooping woodland sedge native 4  
Carex argyrantha hay sedge native 3  
Carex atherodes wheat sedge native 3 -5
Carex atlantica prickly bog sedge native 6 -3
Carex atlantica ssp. atlantica prickly bog sedge native 6 -3
Carex atlantica ssp. capillacea prickly bog sedge native 6 -3
Carex atratiformis scrabrous black sedge native 8 -3
Carex aurea golden sedge native 4 -3
Carex backii Back's sedge native 7  
Carex bebbii Bebb's sedge native 4 -5
Carex bigelowii Bigelow's sedge native 8 -3
Carex blanda eastern woodland sedge native 6 0
Carex brevior shortbeak sedge native 3 0
Carex bromoides brome-like sedge native 4 -3
Carex brunnescens brownish sedge native 4 -3
Carex bullata button sedge native 7 -5
Carex buxbaumii Buxbaum's sedge native 7 -5
Carex canescens silvery sedge native 5 -5
Carex capillaris hair-like sedge native 8 -3
Carex caryophyllea vernal sedge non-native 0  
Carex castanea chestnut sedge native 6 -3
Carex cephaloidea thinleaf sedge native 7 3
Carex cephalophora oval-leaf sedge native 5 3
Carex chordorrhiza creeping sedge native 7 -5
Carex communis fibrousroot sedge native 3  
Carex comosa longhair sedge native 6 -5
Carex conoidea openfield sedge native 4 -3
Carex crawfordii Crawford's sedge native 2 -3
Carex crinita fringed sedge native 3 -5
Carex crinita var. crinita fringed sedge native 3 -5
Carex crinita var. porteri Porter's fringed sedge native 3 -5
Carex cryptolepis northeastern sedge native 5 -5
Carex cumulata clustered sedge native 3 3
Carex debilis white edge sedge native 3 -3
Carex deflexa northern sedge native 3  
Carex deweyana Dewey sedge native 5 3
Carex diandra lesser panicled sedge native 8 -5
Carex digitalis slender woodland sedge native 6 5
Carex disperma softleaf sedge native 5 -5
Carex eburnea bristleleaf sedge native 9 3
Carex echinata star sedge native 3 -5
Carex exilis coastal sedge native 7 -5
Carex flava yellow sedge native 4 -5
Carex foenea bronze sedge native 4 5
Carex folliculata northern long sedge native 5 -5
Carex garberi elk sedge native 7 -3
Carex gracillima graceful sedge native 2 3
Carex granularis limestone meadow sedge native 4 -3
Carex grisea inflated narrow-leaf sedge native 5 0
Carex gynandra nodding sedge native 2 -5
Carex gynocrates northern bog sedge native 8 -5
Carex haydenii Hayden's sedge native 4 -5
Carex hirsutella fuzzy wuzzy sedge native 3  
Carex hirta hammer sedge non-native 0  
Carex hirtifolia pubescent sedge native 6  
Carex hormathodes marsh straw sedge native 6 -5
Carex houghtoniana Houghton's sedge native 3  
Carex hystericina bottlebrush sedge native 4 -5
Carex interior inland sedge native 6 -5
Carex intumescens greater bladder sedge native 3 -3
Carex lacustris hairy sedge native 3 -5
Carex laevivaginata smoothsheath sedge native 7 -5
Carex lasiocarpa woollyfruit sedge native 6 -5
Carex laxiculmis spreading sedge native 7  
Carex laxiflora broad looseflower sedge native 6 5
Carex lenticularis lakeshore sedge native 6 -5
Carex leptalea bristlystalked sedge native 5 -5
Carex leptonervia nerveless woodland sedge native 3 0
Carex limosa mud sedge native 7 -5
Carex livida livid sedge native 9 -5
Carex lucorum Blue Ridge sedge native 3  
Carex lupulina hop sedge native 5 -5
Carex lurida shallow sedge native 2 -5
Carex mackenziei Mackenzie's sedge native 7 -3
Carex magellanica boreal bog sedge native 7 -5
Carex magellanica ssp. irrigua boreal bog sedge native 7 -5
Carex media closedhead sedge native 9 -3
Carex merritt-fernaldii Fernald's sedge native 2  
Carex michauxiana Michaux's sedge native 7 -5
Carex nigra smooth black sedge native 3 -3
Carex normalis greater straw sedge native 2 -3
Carex norvegica ssp. inferalpina closedhead sedge native 8  
Carex novae-angliae New England sedge native 6 3
Carex oligosperma fewseed sedge native 7 -5
Carex ormostachya necklace spike sedge native 5  
Carex oronensis Orono sedge native 3  
Carex ovalis eggbract sedge non-native 0 0
Carex paleacea chaffy sedge native 7 -5
Carex pallescens pale sedge native 3 0
Carex panicea grass-like sedge non-native 0  
Carex pauciflora fewflower sedge native 8 -5
Carex peckii Peck's sedge native 5  
Carex pedunculata longstalk sedge native 5 3
Carex pellita woolly sedge native 6 -5
Carex pensylvanica Pennsylvania sedge native 5  
Carex plantaginea plantainleaf sedge native 7  
Carex platyphylla broadleaf sedge native 7  
Carex polymorpha variable sedge native 4 3
Carex praegracilis clustered field sedge non-native 0 -3
Carex prairea prairie sedge native 7 -3
Carex prasina drooping sedge native 5 -5
Carex projecta necklace sedge native 3 -3
Carex pseudocyperus cypress-like sedge native 4 -5
Carex radiata eastern star sedge native 4 0
Carex retrorsa knotsheath sedge native 4 -5
Carex rosea rosy sedge native 5 3
Carex rostrata blueleaf sedge native 7 -5
Carex saxatilis rock sedge native 9 -3
Carex scabrata eastern rough sedge native 5 -5
Carex scirpoidea northern singlespike sedge native 9 3
Carex scoparia broom sedge native 2 -3
Carex siccata dryspike sedge native 5 5
Carex silicea beach sedge native 5  
Carex sparganioides bur-reed sedge native 7 3
Carex spicata prickly sedge non-native 0 3
Carex sprengelii Sprengel's sedge native 5 0
Carex sterilis dioecious sedge native 7 -5
Carex stipata awlfruit sedge native 3 -5
Carex stricta upright sedge native 4 -5
Carex swanii Swan's sedge native 4 3
Carex tenera quill sedge native 2 0
Carex tenuiflora sparseflower sedge native 7 -5
Carex tetanica rigid sedge native 8 -3
Carex tincta tinged sedge native 2  
Carex tonsa shaved sedge native 3  
Carex torta twisted sedge native 7 -5
Carex tribuloides blunt broom sedge native 3 -3
Carex trisperma threeseeded sedge native 4 -5
Carex trisperma var. billingsii threeseeded sedge native 6 -5
Carex tuckermanii Tuckerman's sedge native 4 -5
Carex typhina cattail sedge native 6 -5
Carex umbellata parasol sedge native 3  
Carex utriculata Northwest Territory sedge native 5 -5
Carex vacillans salt marsh sedge native 9  
Carex vaginata sheathed sedge native 8 -5
Carex vesicaria blister sedge native 5 -5
Carex vestita velvet sedge native 3  
Carex virescens ribbed sedge native 3  
Carex viridula little green sedge native 7 -5
Carex vulpinoidea fox sedge native 2 -5
Carex wiegandii Wiegand's sedge native 6 -5
Carpinus caroliniana American hornbeam native 5 0
Carum carvi caraway non-native 0 5
Carya cordiformis bitternut hickory native 6 0
Carya laciniosa shellbark hickory non-native 0 -3
Carya ovalis red hickory non-native 0 3
Carya ovata shagbark hickory native 5 3
Castanea dentata American chestnut native 6  
Castilleja septentrionalis Labrador Indian paintbrush native 8 3
Catalpa bignonioides southern catalpa non-native 0 3
Catalpa speciosa northern catalpa non-native 0 3
Caulophyllum thalictroides blue cohosh native 7  
Ceanothus americanus New Jersey tea native 6  
Celastrus orbiculatus Oriental bittersweet non-native 0 5
Celastrus scandens American bittersweet native 6 3
Cenchrus spinifex coastal sandbur non-native 0  
Cenchrus tribuloides sanddune sandbur native 8 5
Centaurea cyanus garden cornflower non-native 0 5
Centaurea jacea brownray knapweed non-native 0 3
Centaurea montana perennial cornflower non-native 0  
Centaurea nigra lesser knapweed non-native 0  
Centaurea nigrescens Tyrol knapweed non-native 0  
Centaurea scabiosa greater knapweed non-native 0  
Centaurea stoebe spotted knapweed non-native 0  
Centaurea stoebe ssp. micranthos spotted knapweed non-native 0  
Centaurium pulchellum branched centaury non-native 0 0
Cephalanthus occidentalis common buttonbush native 6 -5
Cerastium arvense field chickweed native 3 3
Cerastium fontanum common mouse-ear chickweed non-native 0 3
Cerastium fontanum ssp. vulgare big chickweed non-native 0 3
Cerastium pumilum European chickweed non-native 0  
Cerastium tomentosum snow in summer non-native 0  
Cerastium vulgatum big chickweed non-native 0  
Ceratophyllum demersum coon's tail native 3 -5
Ceratophyllum echinatum spineless hornwort native 6 -5
Chaenorhinum minus dwarf snapdragon non-native 0  
Chamaecrista nictitans ssp. nictitans var. nictitans partridge pea non-native 0 3
Chamaecyparis thyoides Atlantic white cedar native 7 -5
Chamaedaphne calyculata leatherleaf native 5 -5
Chamaesyce glyptosperma ribseed sandmat native 2  
Chamaesyce maculata spotted sandmat native 2 3
Chamaesyce polygonifolia seaside sandmat native 6 5
Chamaesyce vermiculata wormseed sandmat native 2  
Chamerion angustifolium fireweed native 2  
Chelidonium majus celandine non-native 0 5
Chelone glabra white turtlehead native 6 -5
Chelone lyonii pink turtlehead non-native 0 -3
Chenopodium album lambsquarters non-native 0 3
Chenopodium ambrosioides Mexican tea non-native 0  
Chenopodium berlandieri pitseed goosefoot native 2  
Chenopodium bonus-henricus good King Henry non-native 0  
Chenopodium botrys Jerusalem oak goosefoot non-native 0  
Chenopodium capitatum blite goosefoot native 2  
Chenopodium foggii Fogg's goosefoot native 8  
Chenopodium foliosum leafy goosefoot non-native 0 3
Chenopodium glaucum oakleaf goosefoot non-native 0 -3
Chenopodium graveolens fetid goosefoot non-native 0  
Chenopodium incanum mealy goosefoot non-native 0  
Chenopodium leptophyllum narrowleaf goosefoot non-native 0 3
Chenopodium murale nettleleaf goosefoot non-native 0 3
Chenopodium polyspermum manyseed goosefoot non-native 0  
Chenopodium pratericola desert goosefoot non-native 0  
Chenopodium rubrum red goosefoot native 7 -5
Chenopodium simplex mapleleaf goosefoot native 6  
Chenopodium strictum ssp. glaucophyllum lateflowering goosefoot non-native 0  
Chenopodium urbicum city goosefoot non-native 0  
Chimaphila maculata striped prince's pine native 6  
Chimaphila umbellata pipsissewa native 6  
Chloris cucullata hooded windmill grass non-native 0  
Chloris gayana Rhodes grass non-native 0 3
Chloris virgata feather fingergrass non-native 0 3
Chrysosplenium americanum American golden saxifrage native 5 -5
Cichorium intybus chicory non-native 0 3
Cicuta bulbifera bulblet-bearing water hemlock native 4 -5
Cicuta maculata spotted water hemlock native 4 -5
Cinna arundinacea sweet woodreed native 6 -3
Cinna latifolia drooping woodreed native 5 -3
Circaea alpina small enchanter's nightshade native 5 -3
Circaea lutetiana broadleaf enchanter's nightshade native 5  
Cirsium arvense Canada thistle non-native 0 3
Cirsium discolor field thistle native 2 5
Cirsium muticum swamp thistle native 4 -5
Cirsium pumilum pasture thistle native 2  
Cirsium vulgare bull thistle non-native 0 3
Citrullus lanatus watermelon non-native 0 5
Cladium mariscoides smooth sawgrass native 6 -5
Cladrastis kentukea Kentucky yellowwood non-native 0  
Claytonia caroliniana Carolina springbeauty native 6 3
Clematis occidentalis western blue virginsbower native 6  
Clematis virginiana devil's darning needles native 3 0
Cleome serrulata Rocky Mountain beeplant non-native 0 3
Clethra alnifolia coastal sweetpepperbush native 4 0
Clinopodium acinos basil thyme non-native 0  
Clinopodium vulgare wild basil non-native 0  
Clintonia borealis bluebead native 3 0
Coeloglossum viride longbract frog orchid native 7 0
Collomia linearis tiny trumpet non-native 0 3
Comandra umbellata bastard toadflax native 4 3
Comarum palustre purple marshlocks native 5 -5
Commelina communis Asiatic dayflower non-native 0 0
Comptonia peregrina sweet fern native 2  
Conioselinum chinense Chinese hemlockparsley native 6 -3
Conium maculatum poison hemlock non-native 0 -3
Conopholis americana American cancer-root native 7  
Conringia orientalis hare's ear mustard non-native 0  
Consolida ajacis doubtful knight's-spur non-native 0  
Convallaria majalis European lily of the valley non-native 0  
Convallaria majuscula American lily-of-the-valley non-native 0  
Convolvulus arvensis field bindweed non-native 0  
Convolvulus wallichianus Wallich's bindweed non-native 0  
Conyza canadensis Canadian horseweed native 2  
Coptis trifolia threeleaf goldthread native 6 -3
Corallorhiza autumnalis   native 7  
Corallorhiza maculata summer coralroot native 6 3
Corallorhiza odontorhiza autumn coralroot native 7  
Corallorhiza trifida yellow coralroot native 7 -3
Corema conradii broom crowberry native 6  
Coreopsis grandiflora largeflower tickseed non-native 0  
Coreopsis lanceolata lanceleaf tickseed non-native 0 3
Coreopsis tinctoria golden tickseed non-native 0 3
Cornus alternifolia alternateleaf dogwood native 3 3
Cornus amomum silky dogwood native 2 -3
Cornus canadensis bunchberry dogwood native 4 0
Cornus florida flowering dogwood native 7 3
Cornus racemosa gray dogwood native 4 0
Cornus rugosa roundleaf dogwood native 5  
Cornus sericea redosier dogwood native 2 -3
Cornus sericea ssp. sericea redosier dogwood native 3 -3
Cornus stolonifera redosier dogwood native 2  
Coronilla varia crownvetch non-native 0  
Coronopus didymus Lesser swine-cress non-native 0  
Corydalis sempervirens rock harlequin native 6  
Corylus americana American hazelnut native 5 3
Corylus cornuta beaked hazelnut native 3 3
Corynephorus canescens gray clubawn grass non-native 0  
Cosmos bipinnatus garden cosmos non-native 0 0
Cosmos parviflorus southwestern cosmos non-native 0 3
Crassula aquatica water pygmyweed native 7 -5
Crataegus chrysocarpa fireberry hawthorn native 2  
Crataegus crus-galli cockspur hawthorn non-native 0 0
Crataegus faxonii red haw native 2  
Crataegus flabellata fanleaf hawthorn native 2  
Crataegus flabellata var. flabellata fanleaf hawthorn native 2  
Crataegus flabellata var. grayana fanleaf hawthorn native 2  
Crataegus flavida Dodge's hawthorn native 2  
Crataegus fluviatilis bigfruit hawthorn native 2  
Crataegus fretalis bigfruit hawthorn native 2  
Crataegus holmesiana Holmes' hawthorn non-native 0  
Crataegus irrasa var. blanchardii Blanchard's hawthorn native 2  
Crataegus jonesiae Miss Jones' hawthorn native 2  
Crataegus keepii Keep's hawthorn native 2  
Crataegus laurentiana Miss Jones' hawthorn native 2  
Crataegus lemingtonensis Lemington hawthorn native 2  
Crataegus macracantha var. macracantha Lemington hawthorn native 2  
Crataegus macracantha var. occidentalis fleshy hawthorn native 2  
Crataegus macrosperma bigfruit hawthorn native 2  
Crataegus monogyna oneseed hawthorn non-native 0 3
Crataegus oakesiana Blanchard's hawthorn native 2  
Crataegus phaenopyrum Washington hawthorn non-native 0 0
Crataegus pruinosa var. pruinosa Waxyfruit hawthorn native 2  
Crataegus schuettei Schuette's hawthorn native 2  
Crataegus submollis Quebec hawthorn native 2  
Crepis capillaris smooth hawksbeard non-native 0 5
Crepis tectorum narrowleaf hawksbeard non-native 0  
Crocanthemum bicknellii hoary frostweed native 4  
Crocanthemum canadense longbranch frostweed native 4  
Cryptogramma stelleri fragile rockbrake native 10 3
Cryptotaenia canadensis Canadian honewort native 7 0
Cucurbita maxima winter squash non-native 0  
Cuscuta cephalanthi buttonbush dodder native 3  
Cuscuta epithymum clover dodder non-native 0  
Cuscuta europaea greater dodder non-native 0  
Cuscuta gronovii scaldweed native 2  
Cyclachaena xanthifolia giant sumpweed non-native 0  
Cynanchum louiseae Louise's swallow-wort non-native 0  
Cynoglossum officinale gypsyflower non-native 0 5
Cynoglossum virginianum var. boreale wild comfrey native 7  
Cynosurus cristatus crested dogstail grass non-native 0 0
Cyperus bipartitus slender flatsedge native 3 -3
Cyperus dentatus toothed flatsedge native 3 -5
Cyperus diandrus umbrella flatsedge native 3 -5
Cyperus esculentus yellow nutsedge native 2 -3
Cyperus filicinus fern flatsedge native 5 -5
Cyperus lupulinus Great Plains flatsedge native 3 3
Cyperus lupulinus ssp. macilentus Great Plains flatsedge native 3 3
Cyperus polystachyos manyspike flatsedge native 7 -3
Cyperus squarrosus bearded flatsedge native 5 -5
Cyperus strigosus strawcolored flatsedge native 3 -3
Cypripedium acaule moccasin flower native 4 -3
Cypripedium arietinum ram's head lady's slipper native 6 -3
Cypripedium parviflorum var. makasin greater yellow lady's slipper native 8 0
Cypripedium parviflorum var. parviflorum lesser yellow lady's slipper native 7 0
Cypripedium parviflorum var. pubescens greater yellow lady's slipper native 7 0
Cypripedium reginae showy lady's slipper native 8 -3
Cystopteris bulbifera bulblet bladderfern native 6 -3
Cystopteris fragilis brittle bladderfern native 6 3
Cystopteris tenuis upland brittle bladderfern native 6  
Cytisus scoparius Scotch broom non-native 0  
Dactylis glomerata orchardgrass non-native 0 3
Dactyloctenium aegyptium Egyptian grass non-native 0  
Dactylorhiza viridis longbract frog orchid native 5  
Dalibarda repens robin runaway native 5 0
Danthonia compressa flattened oatgrass native 3 3
Danthonia spicata poverty oatgrass native 2  
Daphne mezereum paradise plant non-native 0 3
Dasiphora fruticosa shrubby cinquefoil native 8 -3
Dasiphora fruticosa ssp. floribunda shrubby cinquefoil native 8 -3
Datura inoxia pricklyburr non-native 0  
Datura stramonium jimsonweed non-native 0  
Daucus carota Queen Anne's lace non-native 0 5
Decodon verticillatus swamp loosestrife native 6 -5
Delphinium exaltatum tall larkspur non-native 0  
Dennstaedtia punctilobula eastern hayscented fern native 2 5
Deparia acrostichoides silver false spleenwort native 3 0
Deschampsia cespitosa tufted hairgrass native 4  
Deschampsia danthonioides annual hairgrass non-native 0 -3
Deschampsia elongata slender hairgrass non-native 0 -3
Deschampsia flexuosa wavy hairgrass native 4 3
Descurainia sophia herb sophia non-native 0  
Desmodium canadense showy ticktrefoil native 4 0
Desmodium glutinosum pointedleaf ticktrefoil native 6  
Desmodium nudiflorum nakedflower ticktrefoil native 6  
Desmodium paniculatum panicledleaf ticktrefoil native 6 3
Desmodium perplexum perplexed ticktrefoil native 5  
Dianthus armeria Deptford pink non-native 0 5
Dianthus barbatus sweetwilliam non-native 0  
Dianthus deltoides maiden pink non-native 0 5
Dianthus plumarius feathered pink non-native 0  
Diapensia lapponica pincushion plant native 10  
Dicentra canadensis squirrel corn native 7  
Dicentra cucullaria dutchman's breeches native 7  
Dicentra spectabilis bleeding heart non-native 0  
Dichanthelium acuminatum tapered rosette grass native 4 0
Dichanthelium acuminatum ssp. columbianum hemlock rosette grass native 5 0
Dichanthelium acuminatum ssp. Implicatum tapered rosette grass native 4 0
Dichanthelium acuminatum ssp. spretum Eaton's rosette grass native 4 0
Dichanthelium acuminatum var. lindheimeri Lindheimer panicgrass native 4 0
Dichanthelium boreale northern panicgrass native 3 0
Dichanthelium clandestinum deertongue native 2 -3
Dichanthelium depauperatum starved panicgrass native 2  
Dichanthelium dichotomum cypress panicgrass native 2 0
Dichanthelium latifolium broadleaf rosette grass native 4 3
Dichanthelium linearifolium slimleaf panicgrass native 4  
Dichanthelium oligosanthes Heller's rosette grass native 3 3
Dichanthelium sphaerocarpon roundseed panicgrass native 3 3
Dichanthelium xanthophysum slender rosette grass native 4  
Diervilla lonicera northern bush honeysuckle native 3  
Digitalis grandiflora yellow foxglove non-native 0  
Digitalis lanata Grecian foxglove non-native 0  
Digitalis purpurea purple foxglove non-native 0 3
Digitaria ischaemum smooth crabgrass non-native 0 3
Digitaria sanguinalis hairy crabgrass non-native 0 3
Diphasiastrum digitatum fan clubmoss native 3  
Diphasiastrum sitchense Sitka clubmoss native 9  
Diphasiastrum tristachyum deeproot clubmoss native 4  
Diplotaxis muralis annual wallrocket non-native 0  
Diplotaxis tenuifolia perennial wallrocket non-native 0  
Dirca palustris eastern leatherwood native 7 0
Distichlis spicata saltgrass native 5 -3
Doellingeria umbellata parasol whitetop native 2 -3
Doellingeria umbellata var. umbellata parasol whitetop native 2 -3
Draba arabisans rock draba native 7  
Draba breweri var. cana cushion draba native 9  
Draba verna spring draba non-native 0  
Drosera anglica English sundew native 9 -5
Drosera intermedia spoonleaf sundew native 3 -5
Drosera linearis slenderleaf sundew native 9 -5
Drosera rotundifolia roundleaf sundew native 3 -5
Dryopteris campyloptera mountain woodfern native 4 3
Dryopteris carthusiana spinulose woodfern native 4 -3
Dryopteris clintoniana Clinton's woodfern native 5 -3
Dryopteris cristata crested woodfern native 4 -5
Dryopteris filix-mas male fern native 8  
Dryopteris fragrans fragrant woodfern native 9  
Dryopteris goldiana Goldie's woodfern native 7 0
Dryopteris intermedia intermediate woodfern native 2 0
Dryopteris marginalis marginal woodfern native 5 3
Dryopteris x boottii Boott's wood fern native 6 -3
Dryopteris x triploidea triploid wood fern native 4 0
Dryopteris x uliginosa spinulose crested wood fern native 4 0
Dulichium arundinaceum threeway sedge native 5 -5
Dyssodia papposa fetid marigold non-native 0  
Echinacea pallida pale purple coneflower non-native 0  
Echinochloa crus-galli barnyardgrass non-native 0 0
Echinochloa frumentacea billion-dollar grass non-native 0 0
Echinochloa muricata rough barnyardgrass native 2 -5
Echinochloa muricata var. microstachya rough barnyardgrass native 2 -5
Echinochloa muricata var. muricata rough barnyardgrass native 2 -5
Echinocystis lobata wild cucumber native 3 -3
Echinops sphaerocephalus great globethistle non-native 0  
Echium creticum Cretan viper's bugloss non-native 0  
Echium vulgare common viper's bugloss non-native 0  
Elaeagnus angustifolia Russian olive non-native 0 3
Elaeagnus umbellata autumn olive non-native 0  
Elatine americana American waterwort native 6 -5
Elatine minima small waterwort native 6 -5
Elatine triandra threestamen waterwort non-native 0 -5
Eleocharis acicularis needle spikerush native 4 -5
Eleocharis aestuum tidal spikerush native 8 -5
Eleocharis diandra Wright's spikerush native 8 -5
Eleocharis elliptica elliptic spikerush native 4 -5
Eleocharis erythropoda bald spikerush native 3  
Eleocharis halophila onescale spikerush native 6 -5
Eleocharis intermedia matted spikerush native 5 -5
Eleocharis nitida quill spikerush native 3 -5
Eleocharis obtusa blunt spikerush native 2 -5
Eleocharis olivacea bright green spikerush native 3 -5
Eleocharis ovata ovate spikerush native 4  
Eleocharis palustris common spikerush native 6 -5
Eleocharis parvula dwarf spikerush native 7 -5
Eleocharis quinqueflora fewflower spikerush native 8 -5
Eleocharis robbinsii Robbins' spikerush native 6 -5
Eleocharis rostellata beaked spikerush native 8 -5
Eleocharis tenuis slender spikerush native 3 -3
Eleocharis uniglumis onescale spikerush native 6  
Eleusine indica Indian goosegrass non-native 0 3
Elodea canadensis Canadian waterweed native 5 -5
Elodea nuttallii western waterweed native 6 -5
Elsholtzia ciliata crested latesummer mint non-native 0  
Elymus canadensis Canada wildrye native 5 3
Elymus hystrix eastern bottlebrush grass native 6 3
Elymus macgregorii Early wild-rye native 8  
Elymus repens quackgrass non-native 0 3
Elymus riparius riverbank wildrye native 6 -3
Elymus trachycaulus slender wheatgrass native 2 3
Elymus trachycaulus ssp. glaucus slender wheatgrass native 4 3
Elymus trachycaulus ssp. trachycaulus slender wheatgrass native 4 3
Elymus virginicus Virginia wildrye native 6 -3
Elymus virginicus var. halophilus Virginia wildrye native 6 -3
Elymus virginicus var. virginicus Virginia wildrye native 6 -3
Elymus wiegandii Wiegand's wildrye native 5 0
Empetrum eamesii ssp. atropurpureum purple crowberry native 8  
Empetrum nigrum black crowberry native 5 0
Epifagus virginiana beechdrops native 5  
Epigaea repens trailing arbutus native 4  
Epilobium anagallidifolium pimpernel willowherb native 10 -3
Epilobium ciliatum fringed willowherb native 3 -3
Epilobium ciliatum ssp. ciliatum fringed willowherb native 3 -3
Epilobium ciliatum ssp. glandulosum fringed willowherb native 3 -3
Epilobium coloratum purpleleaf willowherb native 3 -5
Epilobium hirsutum codlins and cream native 2 -3
Epilobium hornemannii Hornemann's willowherb native 9 -3
Epilobium lactiflorum milkflower willowherb native 10 -3
Epilobium leptophyllum bog willowherb native 4 -5
Epilobium palustre marsh willowherb native 4 -5
Epilobium strictum downy willowherb native 3 -5
Epipactis helleborine broadleaf helleborine non-native 0 5
Equisetum ×litorale littoral horsetail native 4 -5
Equisetum ×mackaii MacKay's horsetail native 3 -3
Equisetum arvense field horsetail native 2 0
Equisetum fluviatile water horsetail native 6 -5
Equisetum hyemale scouringrush horsetail native 2 0
Equisetum hyemale var. affine scouringrush horsetail native 2 0
Equisetum palustre marsh horsetail native 6 -3
Equisetum pratense meadow horsetail native 3 -3
Equisetum scirpoides dwarf scouringrush native 6 0
Equisetum sylvaticum woodland horsetail native 5 -3
Equisetum variegatum variegated scouringrush native 4 -3
Eragrostis capillaris lace grass native 2  
Eragrostis cilianensis stinkgrass non-native 0 3
Eragrostis mexicana Mexican lovegrass non-native 0 0
Eragrostis minor little lovegrass non-native 0  
Eragrostis pectinacea tufted lovegrass native 2 0
Eragrostis pilosa Indian lovegrass native 2 3
Eragrostis spectabilis purple lovegrass native 2 5
Erechtites hieraciifolia American burnweed native 2  
Erica tetralix crossleaf heath non-native 0 3
Erigeron annuus eastern daisy fleabane native 2 3
Erigeron hyssopifolius hyssopleaf fleabane native 9 -3
Erigeron philadelphicus Philadelphia fleabane native 2 0
Erigeron pulchellus robin's plantain native 2 3
Erigeron strigosus prairie fleabane native 2 3
Erigeron strigosus var. septentrionalis prairie fleabane native 2 3
Eriocaulon aquaticum sevenangle pipewort native 7 -5
Eriocaulon parkeri estuary pipewort native 8 -5
Eriophorum angustifolium tall cottongrass native 6 -5
Eriophorum gracile slender cottongrass native 6 -5
Eriophorum tenellum fewnerved cottongrass native 7 -5
Eriophorum vaginatum var. spissum tussock cottongrass native 6 -5
Eriophorum virginicum tawny cottongrass native 6 -5
Eriophorum viridicarinatum thinleaf cottonsedge native 8 -5
Erodium botrys longbeak stork's bill non-native 0 3
Erodium cicutarium redstem stork's bill non-native 0  
Erodium moschatum musky stork's bill non-native 0  
Erucastrum gallicum common dogmustard non-native 0  
Erysimum cheiranthoides wormseed wallflower native 2 3
Erysimum inconspicuum shy wallflower non-native 0  
Erythronium americanum dogtooth violet native 5  
Euonymus atropurpureus burningbush non-native 0 3
Euonymus europaeus European spindletree non-native 0  
Eupatoriadelphus dubius coastal plain joe pye weed native 3  
Eupatoriadelphus fistulosus trumpetweed native 3  
Eupatoriadelphus maculatus spotted trumpetweed native 2  
Eupatorium perfoliatum common boneset native 4 -3
Eupatorium rotundifolium roundleaf thoroughwort non-native 0 0
Euphorbia corollata flowering spurge non-native 0  
Euphorbia cyparissias cypress spurge non-native 0  
Euphorbia esula leafy spurge non-native 0  
Euphorbia glytosperma ribseed sandmat native 2  
Euphorbia helioscopia madwoman's milk non-native 0  
Euphorbia maculata spotted sandmat native 2 3
Euphorbia peplus petty spurge non-native 0  
Euphorbia polygonifolia seaside sandmat native 5 5
Euphorbia vermiculata wormseed sandmat native 2  
Euphrasia nemorosa common eyebright non-native 0  
Euphrasia oakesii Oakes' eyebright native 10  
Euphrasia randii small eyebright native 4 -3
Euphrasia stricta drug eyebright non-native 0 3
Eurybia divaricata white wood aster native 6  
Eurybia macrophylla bigleaf aster native 4 5
Eurybia radula low rough aster native 6 -5
Euthamia caroliniana common goldentop native 6 0
Euthamia graminifolia common goldentop native 2 0
Fagopyrum esculentum buckwheat non-native 0  
Fagopyrum tataricum Tartery buckwheat non-native 0  
Fagus grandifolia American beech native 3 3
Fagus sylvatica European beech non-native 0  
Fallopia cilinodis fringed black bindweed native 4  
Festuca arundinacea tall fescue non-native 0 3
Festuca brevipila hard fescue non-native 0  
Festuca filiformis fineleaf sheep fescue non-native 0  
Festuca heteromalla Chewing's fescue non-native 0  
Festuca nigrescens Chewing's fescue non-native 0  
Festuca ovina sheep fescue non-native 0 5
Festuca rubra ssp. commutata Chewing's fescue non-native 0 3
Festuca rubra ssp. fallax Chewing's fescue non-native 0 3
Festuca rubra ssp. pruinosa rock fescue native 2 3
Festuca rubra ssp. rubra red fescue non-native 0 3
Festuca rubra var. prolifera red fescue native 10 3
Festuca subverticillata nodding fescue native 7 3
Festuca trachyphylla hard fescue non-native 0 5
Filipendula rubra queen of the prairie non-native 0 -3
Filipendula ulmaria queen of the meadow non-native 0 0
Filipendula vulgaris dropwort non-native 0  
Fimbristylis autumnalis slender fimbry native 7 -3
Foeniculum vulgare sweet fennel non-native 0  
Fragaria vesca woodland strawberry native 4 5
Fragaria virginiana Virginia strawberry native 2 3
Frangula alnus glossy buckthorn non-native 0 0
Fraxinus americana white ash native 2 3
Fraxinus nigra black ash native 6 -3
Fraxinus pennsylvanica green ash native 2 -3
Fumaria officinalis drug fumitory non-native 0  
Gaillardia pulchella firewheel non-native 0 5
Galearis spectabilis showy orchid native 8  
Galega officinalis professor-weed non-native 0  
Galeopsis bifida splitlip hempnettle non-native 0  
Galeopsis tetrahit brittlestem hempnettle non-native 0 3
Galinsoga parviflora gallant soldier non-native 0 5
Galinsoga quadriradiata shaggy soldier non-native 0 3
Galium aparine stickywilly native 2 3
Galium asprellum rough bedstraw native 2 -5
Galium boreale northern bedstraw native 4 0
Galium circaezans licorice bedstraw native 5 3
Galium circaezans var. circaezans licorice bedstraw native 8 3
Galium circaezans var. hypomalacum licorice bedstraw native 8 3
Galium kamtschaticum boreal bedstraw native 6  
Galium labradoricum northern bog bedstraw native 9 -5
Galium lanceolatum lanceleaf wild licorice native 6  
Galium mollugo false baby's breath non-native 0 3
Galium palustre common marsh bedstraw native 4 -5
Galium sylvaticum Scotch mist non-native 0  
Galium tinctorium stiff marsh bedstraw native 3 -5
Galium trifidum threepetal bedstraw native 4 -3
Galium trifidum var. halophilum threepetal bedstraw native 8 -3
Galium triflorum fragrant bedstraw native 6 3
Galium verum Yellow Spring bedstraw non-native 0  
Gastridium phleoides nit grass non-native 0 3
Gaultheria hispidula creeping snowberry native 6 -3
Gaultheria procumbens eastern teaberry native 4 3
Gaylussacia baccata black huckleberry native 5 3
Gaylussacia dumosa dwarf huckleberry native 8 0
Genista tinctoria Dyer's greenweed non-native 0  
Gentiana clausa bottle gentian native 6 -3
Gentiana linearis narrowleaf gentian native 6 -3
Gentiana rubricaulis closed gentian native 3 -5
Gentianella amarella autumn dwarf gentian native 7 -5
Gentianopsis crinita greater fringed gentian native 4 -3
Geocaulon lividum false toadflax native 8 0
Geranium bicknellii Bicknell's cranesbill native 3  
Geranium carolinianum Carolina geranium native 3  
Geranium maculatum spotted geranium native 5 3
Geranium molle dovefoot geranium non-native 0  
Geranium pratense meadow geranium non-native 0  
Geranium pusillum small geranium non-native 0  
Geranium robertianum Robert geranium non-native 0 3
Geranium sanguineum bloody geranium non-native 0  
Geum aleppicum yellow avens native 5 0
Geum canadense white avens native 4 0
Geum fragarioides Appalachian barren strawberry native 5  
Geum laciniatum rough avens native 6 -3
Geum laciniatum var. laciniatum rough avens native 3 -3
Geum laciniatum var. trichocarpum rough avens native 3 -3
Geum macrophyllum largeleaf avens native 5 -3
Geum rivale purple avens native 5 -5
Glaux maritima sea milkwort native 7 -5
Glebionis coronaria crown daisy non-native 0  
Glebionis coronarium crown daisy non-native 0  
Glebionis segetum corndaisy non-native 0  
Glechoma hederacea ground ivy non-native 0 3
Gleditsia triacanthos honeylocust non-native 0 0
Glyceria acutiflora creeping mannagrass native 8 -5
Glyceria borealis small floating mannagrass native 6 -5
Glyceria canadensis rattlesnake mannagrass native 4 -5
Glyceria grandis American mannagrass native 5 -5
Glyceria laxa limp mannagrass native 6 -5
Glyceria melicaria melic mannagrass native 4 -5
Glyceria obtusa Atlantic mannagrass native 6 -5
Glyceria striata fowl mannagrass native 3 -5
Glycyrrhiza lepidota American licorice non-native 0 3
Gnaphalium uliginosum marsh cudweed native 2 0
Goodyera oblongifolia western rattlesnake plantain native 8 3
Goodyera pubescens downy rattlesnake plantain native 6 3
Goodyera repens lesser rattlesnake plantain native 6 3
Goodyera tesselata checkered rattlesnake plantain native 6 3
Gratiola aurea golden hedgehyssop native 6 -5
Gratiola neglecta clammy hedgehyssop native 5 -5
Grindelia squarrosa curlycup gumweed non-native 0 3
Gymnocarpium dryopteris western oakfern native 6 3
Gymnocladus dioicus Kentucky coffeetree non-native 0  
Gypsophila elegans showy baby's-breath non-native 0  
Gypsophila muralis low baby's-breath non-native 0  
Gypsophila paniculata baby's breath non-native 0  
Gypsophila repens creeping baby's breath non-native 0  
Hackelia deflexa var. americana American stickseed native 7  
Halenia deflexa American spurred gentian native 4 0
Hamamelis virginiana American witchhazel native 5 3
Harrimanella hypnoides mossplant native 10  
Hedeoma hispida rough false pennyroyal non-native 0  
Hedeoma pulegioides American false pennyroyal native 2  
Hedysarum alpinum alpine sweetvetch native 8 0
Helenium autumnale common sneezeweed native 4 -3
Helenium flexuosum purplehead sneezeweed native 2 0
Helianthemum bicknellii hoary frostweed native 4  
Helianthemum canadense longbranch frostweed native 4  
Helianthus annuus common sunflower non-native 0 3
Helianthus debilis cucumberleaf sunflower non-native 0 5
Helianthus decapetalus thinleaf sunflower native 6 3
Helianthus divaricatus woodland sunflower native 6  
Helianthus giganteus giant sunflower native 5 -3
Helianthus grosseserratus sawtooth sunflower non-native 0 -3
Helianthus maximiliani Maximilian sunflower non-native 0 5
Helianthus mollis ashy sunflower non-native 0  
Helianthus pauciflorus stiff sunflower non-native 0  
Helianthus petiolaris prairie sunflower non-native 0  
Helianthus strumosus paleleaf woodland sunflower native 3 3
Helianthus tuberosus Jerusalem artichoke non-native 0 3
Heliopsis helianthoides smooth oxeye non-native 0 3
Heliopsis helianthoides var. scabra smooth oxeye non-native 0 3
Heliotropium curassavicum salt heliotrope non-native 0 -5
Hemerocallis fulva orange daylily non-native 0 5
Hemerocallis lilioasphodelus yellow daylily non-native 0  
Hepatica nobilis var. obtusa round leaf hepatica native 7  
Heracleum mantegazzianum giant hogweed non-native 0 0
Heracleum maximum common cowparsnip native 3 -3
Heracleum sphondylium eltrot non-native 0 5
Herniaria glabra smooth rupturewort non-native 0  
Hesperis matronalis dames rocket non-native 0 3
Heteranthera dubia grassleaf mudplantain native 6 -5
Hibiscus trionum flower of an hour non-native 0  
Hieracium aurantiacum orange hawkweed non-native 0  
Hieracium caespitosum meadow hawkweed non-native 0  
Hieracium canadense Canadian hawkweed native 2  
Hieracium flagellare hawkweed non-native 0  
Hieracium gronovii queendevil native 3 5
Hieracium kalmii narrowleaf hawkweed native 3  
Hieracium lachenalii common hawkweed non-native 0  
Hieracium murorum wall hawkweed non-native 0  
Hieracium paniculatum Allegheny hawkweed native 6  
Hieracium pilosella mouseear hawkweed non-native 0  
Hieracium piloselloides tall hawkweed non-native 0  
Hieracium praealtum tall hawkweed non-native 0  
Hieracium robinsonii Robinson's hawkweed native 9  
Hieracium scabrum rough hawkweed native 4  
Hieracium venosum rattlesnakeweed native 5  
Hierochloe odorata sweetgrass native 5  
Hippuris vulgaris common mare's-tail native 6 -5
Holcus lanatus common velvetgrass non-native 0 3
Honckenya peploides seaside sandplant native 7 3
Hordeum brachyantherum meadow barley non-native 0 -3
Hordeum jubatum foxtail barley native 2 0
Hordeum murinum ssp. leporinum hare barley non-native 0 3
Hordeum pusillum little barley non-native 0 0
Hordeum vulgare common barley non-native 0  
Hottonia inflata American featherfoil native 8 -5
Houstonia caerulea azure bluet non-native 0 3
Houstonia longifolia longleaf summer bluet native 7  
Houstonia purpurea Venus' pride native 4  
Hudsonia ericoides pine barren goldenheather native 5  
Hudsonia tomentosa woolly beachheather native 5  
Humulus japonicus Japanese hop non-native 0 3
Humulus lupulus common hop native 2 3
Humulus lupulus var. lupuloides common hop native 2 3
Humulus lupulus var. lupulus common hop native 2 3
Huperzia appalachiana Appalachian clubmoss native 8  
Huperzia appressa mountain fir moss native 9  
Huperzia lucidula shining clubmoss native 6 0
Huperzia selago var. selago fir clubmoss native 7 3
Hydrangea paniculata panicled hydrangea non-native 0 0
Hydrilla verticillata waterthyme non-native 0 -5
Hydrocotyle americana American marshpennywort native 5 -5
Hylotelephium erythrostictum garden stonecrop non-native 0  
Hylotelephium telephium ssp. telephium witch's moneybags non-native 0  
Hyoscyamus niger black henbane non-native 0  
Hypericum ascyron great St. Johnswort native 7 0
Hypericum boreale northern St. Johnswort native 6 -5
Hypericum canadense lesser Canadian St. Johnswort native 5 -3
Hypericum dissimulatum disguised St. Johnswort native 4  
Hypericum ellipticum pale St. Johnswort native 4 -5
Hypericum gentianoides orangegrass native 4 3
Hypericum majus large St. Johnswort native 4 -3
Hypericum mutilum dwarf St. Johnswort native 5 -3
Hypericum perforatum common St. Johnswort non-native 0 5
Hypericum prolificum shrubby St. Johnswort non-native 0 3
Hypericum punctatum spotted St. Johnswort native 2 0
Hypochaeris glabra smooth cat's ear non-native 0  
Hypochaeris radicata hairy cat's ear non-native 0 3
Hyssopus officinalis hyssop non-native 0  
Iberis amara annual candytuft non-native 0  
Iberis umbellata globe candytuft non-native 0  
Ilex glabra inkberry native 8 -3
Ilex laevigata smooth winterberry native 6 -5
Ilex mucronata catberry native 5  
Ilex opaca American holly non-native 0 3
Ilex verticillata common winterberry native 3 -3
Impatiens capensis jewelweed native 2 -3
Impatiens glandulifera ornamental jewelweed non-native 0 0
Impatiens pallida pale touch-me-not native 8 -3
Inula helenium elecampane inula non-native 0 3
Ionactis linariifolia flaxleaf whitetop aster native 4  
Ionactis linariifolius flaxleaf whitetop aster native 4  
Ipomoea hederacea ivyleaf morning-glory non-native 0 0
Ipomoea purpurea tall morning-glory non-native 0 3
Iris germanica German iris non-native 0  
Iris hookeri Canada beachhead iris native 8 -3
Iris prismatica slender blue iris native 5 -5
Iris pseudacorus paleyellow iris non-native 0 -5
Iris setosa beachhead iris native 8 -3
Iris versicolor harlequin blueflag native 3 -5
Isoetes acadiensis Acadian quillwort native 6 -5
Isoetes echinospora spiny-spore quillwort native 6 -5
Isoetes hieroglyphica lake quillwort non-native 0  
Isoetes lacustris lake quillwort native 8 -5
Isoetes prototypus spike quillwort native 8 -5
Isoetes tuckermanii Tuckerman's quillwort native 6 -5
Isotrema macrophyllum pipevine non-native 0  
Isotria medeoloides small whorled pogonia native 6 3
Iva annua annual marsh elder non-native 0 0
Iva xanthifolia giant sumpweed non-native 0  
Juglans ailantifolia Japanese walnut non-native 0  
Juglans cinerea butternut native 5 3
Juglans nigra black walnut non-native 0 3
Juncus acuminatus tapertip rush native 5 -5
Juncus alpinoarticulatus northern green rush native 8 -5
Juncus alpinoarticulatus ssp. nodulosus northern green rush native 8 -5
Juncus ambiguus seasice rush native 7  
Juncus anthelatus greater poverty rush native 3 -3
Juncus arcticus arctic rush native 5 -5
Juncus articulatus jointleaf rush native 6 -5
Juncus brachycephalus smallhead rush native 6 -5
Juncus brevicaudatus narrowpanicle rush native 3 -5
Juncus bufonius toad rush native 2 -3
Juncus canadensis Canadian rush native 3 -5
Juncus compressus roundfruit rush non-native 0 -3
Juncus dichotomus forked rush native 3 -3
Juncus dudleyi Dudley's rush native 5 -3
Juncus effusus common rush native 2 -5
Juncus effusus var. effusus common rush native 2 -5
Juncus effusus var. solutus lamp rush native 2 -5
Juncus filiformis thread rush native 5 -3
Juncus gerardii saltmeadow rush native 6 -5
Juncus greenei Greene's rush native 3 0
Juncus marginatus grassleaf rush native 2 -3
Juncus militaris bayonet rush native 6 -5
Juncus nodosus knotted rush native 6 -5
Juncus pelocarpus brownfruit rush native 4 -5
Juncus secundus lopsided rush native 6 3
Juncus stygius moor rush native 9 -5
Juncus subtilis greater creeping rush native 7 -5
Juncus tenuis poverty rush native 2 0
Juncus trifidus highland rush native 7 3
Juncus vaseyi Vasey's rush native 6 -3
Juniperus communis common juniper native 3 3
Juniperus horizontalis creeping juniper native 4 3
Juniperus virginiana eastern redcedar native 4 3
Kalmia angustifolia sheep laurel native 2 0
Kalmia latifolia mountain laurel native 6 3
Kalmia polifolia bog laurel native 8 -5
Knautia arvensis field scabiosa non-native 0  
Kochia scoparia burningbush non-native 0  
Koeleria macrantha prarie Junegrass non-native 0  
Krigia virginica Virginia dwarfdandelion native 4 5
Lactuca biennis tall blue lettuce native 5 0
Lactuca canadensis Canada lettuce native 3 3
Lactuca hirsuta hairy lettuce native 3  
Lactuca sativa garden lettuce non-native 0  
Lactuca serriola prickly lettuce non-native 0 3
Lactuca tatarica blue lettuce non-native 0 0
Lactuca tatarica var. pulchella blue lettuce non-native 0 0
Lamium album white deadnettle non-native 0  
Lamium amplexicaule henbit deadnettle non-native 0  
Lamium maculatum spotted henbit non-native 0  
Lamium purpureum purple deadnettle non-native 0  
Lamium purpureum var. incisum purple deadnettle non-native 0  
Lamium purpureum var. purpureum purple deadnettle non-native 0  
Lamprocapnos spectabilis bleeding heart non-native 0  
Laportea canadensis Canadian woodnettle native 6 -3
Lappula occidentalis flatspine stickseed non-native 0  
Lappula squarrosa European stickseed non-native 0  
Lapsana communis common nipplewort non-native 0 3
Larix decidua European larch non-native 0  
Larix laricina tamarack native 4 -3
Lathyrus japonicus beach pea native 4 3
Lathyrus japonicus var. maritimus beach pea native 4 3
Lathyrus japonicus var. pellitus beach pea native 4 3
Lathyrus latifolius perennial pea non-native 0  
Lathyrus odoratus sweetpea non-native 0  
Lathyrus palustris marsh pea native 4 -3
Lathyrus pratensis meadow pea non-native 0 3
Lathyrus tuberosus tuberous sweetpea non-native 0  
Lechea intermedia largepod pinweed native 4  
Lechea intermedia var. intermedia largepod pinweed native 2  
Lechea intermedia var. juniperina largepod pinweed native 2  
Lechea maritima beach pinweed native 7  
Ledum groenlandicum bog Labrador tea native 6  
Leersia oryzoides rice cutgrass native 5 -5
Leersia virginica whitegrass native 5 -3
Lemna minor common duckweed native 3 -5
Lemna trisulca star duckweed native 4 -5
Lens culinaris lentil non-native 0  
Leontodon autumnalis fall dandelion non-native 0 3
Leonurus cardiaca common motherwort non-native 0  
Lepidium campestre field pepperweed non-native 0  
Lepidium densiflorum common pepperweed non-native 0 3
Lepidium didymum lesser swine-cress non-native 0  
Lepidium perfoliatum clasping pepperweed non-native 0 3
Lepidium ruderale roadside pepperweed non-native 0  
Lepidium sativum gardencress pepperweed non-native 0  
Lepidium virginicum Virginia pepperweed native 2 3
Leptochloa fusca ssp. fascicularis bearded sprangletop non-native 0  
Leptochloa fusca ssp. uninervia Mexican sprangletop non-native 0  
Lespedeza capitata roundhead lespedeza native 4 3
Lespedeza frutescens shrubby lespedeza native 4  
Lespedeza hirta hairy lespedeza native 6  
Lespedeza intermedia violet lespedeza native 6  
Leucanthemum vulgare oxeye daisy non-native 0 5
Leucojum aestivum summer snowflake non-native 0  
Levisticum officinale garden lovage non-native 0  
Leymus mollis American dunegrass native 6 3
Liatris novae-angliae New England blazing star native 5  
Liatris scariosa var. novae-angliae New England blazing star native 6 5
Ligusticum scoticum Scottish licorice-root non-native 0 0
Ligustrum amurense Amur privet non-native 0  
Ligustrum vulgare European privet non-native 0 3
Lilaeopsis chinensis eastern grasswort native 7 -5
Lilium canadense Canada lily native 6 0
Lilium lancifolium tiger lily non-native 0  
Lilium philadelphicum wood lily native 6 0
Limonium carolinianum lavender thrift native 6 -5
Limosella australis Welsh mudwort native 7 -5
Linaria dalmatica Dalmation toadflax non-native 0  
Linaria maroccana Moraccan toadflax non-native 0  
Linaria repens striped toadflax non-native 0  
Linaria vulgaris butter and eggs non-native 0  
Lindera benzoin northern spicebush native 6 -3
Lindernia dubia yellowseed false pimpernel native 4 -5
Lindernia dubia var. anagallidea yellowseed false pimpernel native 6 -5
Lindernia dubia var. dubia yellowseed false pimpernel native 5 -5
Lindernia dubia var. inundata yellowseed false pimpernel native 6 -5
Linnaea borealis twinflower native 3 0
Linum catharticum fairy flax non-native 0  
Linum medium stiff yellow flax native 3 3
Linum medium var. texanum stiff yellow flax native 3 3
Linum perenne blue flax non-native 0  
Linum radiola allseed non-native 0  
Linum usitatissimum common flax non-native 0  
Liparis loeselii yellow widelip orchid native 6 -3
Lipocarpha micrantha smallflower halfchaff sedge native 7 -5
Listera auriculata auricled twayblade native 7 -3
Listera convallarioides broadlipped twayblade native 8 -3
Listera cordata heartleaf twayblade native 8 -3
Lithospermum officinale European stoneseed non-native 0  
Littorella uniflora American shoreweed native 6  
Lobelia cardinalis cardinalflower native 6 -5
Lobelia dortmanna Dortmann's cardinalflower native 8 -5
Lobelia inflata Indian-tobacco native 2 3
Lobelia kalmii Ontario lobelia native 8 -5
Lobelia spicata palespike lobelia native 4 0
Lobelia spicata var. campanulata palespike lobelia native 4 0
Lobelia spicata var. hirtella palespike lobelia native 4 0
Lobelia spicata var. spicata palespike lobelia native 4 0
Lobularia maritima sweet alyssum non-native 0  
Loiseleuria procumbens alpine azalea native 10 -3
Lolium arundinaceum tall fescue non-native 0  
Lolium multiflorum annual ryegrass non-native 0  
Lolium perenne perennial ryegrass non-native 0 3
Lolium pratense meadow fescue non-native 0  
Lolium temulentum Darnel ryegrass non-native 0  
Lomatogonium rotatum marsh felwort native 8 -5
Lonicera ×bella showy fly honeysuckle non-native 0 3
Lonicera canadensis American fly honeysuckle native 5 3
Lonicera dioica limber honeysuckle native 5 3
Lonicera japonica Japanese honeysuckle non-native 0 3
Lonicera morrowii Morrow's honeysuckle non-native 0 3
Lonicera oblongifolia swamp fly honeysuckle native 7 -5
Lonicera periclymenum European honeysuckle non-native 0  
Lonicera sempervirens trumpet honeysuckle non-native 0 3
Lonicera tatarica Tatarian honeysuckle non-native 0 3
Lonicera villosa mountain fly honeysuckle native 6 -3
Lonicera xylosteum dwarf honeysuckle non-native 0  
Lotus corniculatus bird's-foot trefoil non-native 0 3
Ludwigia palustris marsh seedbox native 5 -5
Ludwigia polycarpa manyfruit primrose-willow native 5 -5
Lunaria annua annual honesty non-native 0  
Lupinus polyphyllus bigleaf lupine non-native 0 3
Luzula acuminata hairy woodrush native 3 3
Luzula confusa northern woodrush native 10 0
Luzula luzuloides oakforest woodrush non-native 0  
Luzula multiflora common woodrush native 2 3
Luzula pallidula Eurasian woodrush non-native 0 0
Luzula parviflora smallflowered woodrush native 5 0
Luzula spicata spiked woodrush native 10 5
Lychnis chalcedonica maltesecross non-native 0  
Lychnis coronaria rose campion non-native 0  
Lychnis flos-cuculi ragged robin non-native 0  
Lychnis viscaria clammy campion non-native 0  
Lycium barbarum matrimony vine non-native 0  
Lycium chinense Chinese desert-thorn non-native 0  
Lycopodiella alopecuroides foxtail clubmoss native 4 -3
Lycopodiella appressa southern bog clubmoss native 5 -3
Lycopodiella inundata inundated clubmoss native 3 -5
Lycopodium annotinum stiff clubmoss native 4  
Lycopodium canadense spinach native 7  
Lycopodium clavatum running clubmoss native 3 0
Lycopodium complanatum groundcedar native 4  
Lycopodium dendroideum tree groundpine native 4  
Lycopodium digitatum fan clubmoss native 4  
Lycopodium hickeyi Pennsylvania clubmoss native 5  
Lycopodium lagopus one-cone clubmoss native 3 3
Lycopodium obscurum rare clubmoss native 3  
Lycopodium sabinifolium savinleaf groundpine native 4  
Lycopodium sitchense Sitka clubmoss native 7  
Lycopodium tristachyum deeproot clubmoss native 6  
Lycopus americanus American water horehound native 3 -5
Lycopus uniflorus northern bugleweed native 3 -5
Lycopus virginicus Virginia water horehound native 5 -5
Lycurus phleoides UNK non-native 0  
Lycurus setosus bristly wolfstail non-native 0  
Lyonia ligustrina maleberry native 4 -3
Lysimachia ×producta UNK native 3 0
Lysimachia arvensis scarlet pimpernel non-native 0 3
Lysimachia ciliata fringed loosestrife native 5 -3
Lysimachia clethroides gooseneck yellow loosestrife non-native 0  
Lysimachia hybrida lowland yellow loosestrife non-native 0 -5
Lysimachia nummularia creeping jenny non-native 0 -3
Lysimachia punctata large yellow loosestrife non-native 0 -5
Lysimachia quadrifolia whorled yellow loosestrife native 4 3
Lysimachia terrestris earth loosestrife native 2 -5
Lysimachia thyrsiflora tufted loosestrife native 6 -5
Lysimachia vulgaris garden yellow loosestrife non-native 0 -3
Lythrum alatum winged lythrum non-native 0 -5
Lythrum hyssopifolia hyssop loosestrife native 4  
Lythrum hyssopifolium hyssop loosestrife non-native 0 -5
Lythrum salicaria purple loosestrife non-native 0 -5
Macleaya cordata plume poppy non-native 0  
Madia glomerata mountain tarweed non-native 0 3
Madia sativa coast tarweed non-native 0  
Magnolia acuminata cucumber-tree non-native 0 3
Maianthemum canadense Canada mayflower native 2 3
Maianthemum racemosum feathery false lily of the valley native 5 3
Maianthemum racemosum ssp. racemosum feathery false lily of the valley native 5 3
Maianthemum stellatum starry false lily of the valley native 7 0
Maianthemum trifolium threeleaf false lily of the valley native 7 -5
Malaxis brachypoda white adder's-mouth orchid native 8  
Malaxis monophyllos ssp. brachypoda white adder's-mouth orchid native 9 -3
Malaxis unifolia green adder's-mouth orchid native 7 0
Malus baccata Siberian crabapple non-native 0  
Malus prunifolia plum leaf crabapple non-native 0  
Malus pumila paradise apple non-native 0  
Malva alcea vervain mallow non-native 0  
Malva crispa cluster mallow non-native 0  
Malva moschata musk mallow non-native 0  
Malva neglecta common mallow non-native 0  
Malva sylvestris high mallow non-native 0  
Marrubium vulgare horehound non-native 0 3
Marsilea quadrifolia European waterclover non-native 0 -5
Matricaria discoidea disc mayweed non-native 0 3
Matricaria maritima false mayweed non-native 0  
Matricaria perforata scentless false mayweed non-native 0  
Matricaria recutita German chamomile non-native 0  
Matteuccia struthiopteris ostrich fern native 5 0
Mazus miquelii Miquel's mazus non-native 0  
Medeola virginiana Indian cucumber native 5 3
Medicago arabica spotted medick non-native 0  
Medicago laciniata cutleaf medick non-native 0  
Medicago lupulina black medick non-native 0 3
Medicago polymorpha burclover non-native 0 3
Medicago sativa alfalfa non-native 0 5
Melampyrum lineare narrowleaf cowwheat native 6 3
Melilotus altissimus tall yellow sweetclover non-native 0  
Melilotus indicus annual yellow sweetclover non-native 0 3
Melilotus officinalis yellow sweetclover non-native 0 3
Melissa officinalis common balm non-native 0 5
Mentha aquatica water mint non-native 0 -5
Mentha arvensis wild mint native 5 -3
Mentha canadensis wild mint native 6  
Mentha spicata spearmint non-native 0 -3
Mentha suaveolens apple mint non-native 0 0
Mentha x gracilis gingermint non-native 0 -5
Mentha x piperita peppermint non-native 0 -5
Mentha x villosa UNK non-native 0 0
Menyanthes trifoliata buckbean native 8 -5
Mercurialis annua annual mercury non-native 0  
Mertensia maritima oysterleaf native 6 -3
Mertensia virginica Virginia bluebells non-native 0 0
Milium effusum American milletgrass native 7 3
Mimulus moschatus muskflower non-native 0 -5
Mimulus ringens Allegheny monkeyflower native 6 -5
Mimulus ringens var. colpophilus Allegheny monkeyflower native 7 -5
Mimulus ringens var. ringens Allegheny monkeyflower native 6 -5
Minuartia glabra Appalachian stitchwort native 6 5
Minuartia groenlandica Greenland stitchwort native 8  
Minuartia rubella beautiful sandwort native 9 5
Mirabilis hirsuta hairy four o'clock non-native 0  
Mirabilis nyctaginea heartleaf four o'clock non-native 0 5
Miscanthus sacchariflorus Amur silvergrass non-native 0  
Misopates orontium linearleaf snapdragon non-native 0  
Mitchella repens partridgeberry native 5 3
Mitella nuda naked miterwort native 7 -3
Moehringia lateriflora bluntleaf sandwort native 5 3
Molinia caerulea purple moorgrass non-native 0 3
Mollugo verticillata green carpetweed non-native 0 0
Monarda didyma scarlet beebalm non-native 0 3
Monarda fistulosa wild bergamot non-native 0 3
Monarda media purple bergamot non-native 0  
Moneses uniflora single delight native 7 0
Monolepis nuttalliana Nuttall's povertyweed non-native 0 5
Monotropa hypopithys pinesap native 6  
Monotropa uniflora Indianpipe native 6 3
Montia fontana annual water minerslettuce native 9 -5
Morella pensylvanica northern bayberry native 5 0
Morus alba white mulberry non-native 0 3
Muhlenbergia frondosa wirestem muhly native 2 -3
Muhlenbergia glomerata spiked muhly native 7 -5
Muhlenbergia mexicana Mexican muhly native 4 -3
Muhlenbergia racemosa marsh muhly native 2 3
Muhlenbergia richardsonis mat muhly native 8 -3
Muhlenbergia schreberi nimblewill native 2 0
Muhlenbergia sobolifera rock muhly native 8  
Muhlenbergia sylvatica woodland muhly native 6 -3
Muhlenbergia uniflora bog muhly native 4 -5
Mycelis muralis wall lettuce non-native 0  
Myosotis arvensis field forget-me-not non-native 0 3
Myosotis discolor changing forget-me-not non-native 0 5
Myosotis laxa bay forget-me-not native 5 -5
Myosotis scorpioides true forget-me-not non-native 0 -5
Myosotis stricta strict forget-me-not non-native 0  
Myosotis sylvatica woodland forget-me-not non-native 0 5
Myosotis verna spring forget-me-not native 4 3
Myrica gale sweetgale native 5 -5
Myrica pensylvanica northern bayberry native 5  
Myriophyllum alterniflorum alternateflower watermilfoil native 6 -5
Myriophyllum farwellii Farwell's watermilfoil native 7 -5
Myriophyllum heterophyllum twoleaf watermilfoil non-native 0 -5
Myriophyllum humile low watermilfoil native 6 -5
Myriophyllum sibiricum shortspike watermilfoil native 5 -5
Myriophyllum spicatum Eurasian watermilfoil non-native 0 -5
Myriophyllum tenellum slender watermilfoil native 7 -5
Myriophyllum verticillatum whorl-leaf watermilfoil native 5 -5
Najas flexilis nodding waternymph native 6 -5
Najas gracillima slender waternymph native 6 -5
Najas guadalupensis southern waternymph native 3 -5
Narcissus poeticus poet's narcissus non-native 0  
Nasturtium microphyllum small-leaved watercress non-native 0 -5
Nasturtium officinale watercress non-native 0 -5
Nelumbo lutea American lotus non-native 0 -5
Nepeta cataria catnip non-native 0 3
Neslia paniculata ballmustard non-native 0  
Nicandra physalodes apple of Peru non-native 0  
Nigella damascena devil in the bush non-native 0  
Nonea rosea rose monkwort non-native 0  
Nuphar lutea yellow pond-lily native 6 -5
Nuphar lutea ssp. variegata varigated yellow pond-lily native 4 -5
Nuphar microphylla yellow pond-lily native 7 -5
Nuttallanthus canadensis Canada toadflax native 2  
Nymphaea leibergii Leiberg's waterlily native 8 -5
Nymphaea odorata American white waterlily native 5 -5
Nymphaea odorata ssp. tuberosa American white waterlily non-native 0 -5
Nymphoides cordata little floatingheart native 6 -5
Nyssa sylvatica blackgum native 7 0
Oclemena acuminata whorled wood aster native 3 3
Oclemena nemoralis bog aster native 8 -5
Odontites vernus red bartsia native 2  
Oenothera biennis common evening primrose native 2 3
Oenothera fruticosa narrowleaf evening primrose non-native 0 3
Oenothera fruticosa ssp. glauca narrowleaf evening primrose non-native 0 3
Oenothera glazioviana redsepal evening primrose non-native 0  
Oenothera laciniata cutleaf evening primrose non-native 0 3
Oenothera nutans nodding evening primrose native 3  
Oenothera oakesiana Oakes' evening primrose native 2  
Oenothera parviflora northern evening primrose native 3 3
Oenothera perennis little evening primrose native 2 0
Oenothera pilosella meadow evening primrose non-native 0 0
Oenothera villosa hairy evening primrose native 2 0
Omalotheca supina alpine cudweed native 10  
Omalotheca sylvatica woodland arctic cutweed native 3  
Onoclea sensibilis sensitive fern native 2 -3
Ophioglossum pusillum northern adderstongue native 4 -3
Ornithogalum umbellatum sleepydick non-native 0 3
Orobanche uniflora oneflowered broomrape native 4 5
Orthilia secunda sidebells wintergreen native 7 0
Oryzopsis asperifolia roughleaf ricegrass native 6  
Osmorhiza berteroi sweetcicely native 7 3
Osmorhiza claytonii Clayton's sweetroot native 7 3
Osmorhiza depauperata blunt fruited sweet cicely native 8  
Osmorhiza longistylis longstyle sweetroot native 7 3
Osmunda cinnamomea cinnamon fern native 4 -3
Osmunda claytoniana interrupted fern native 3 0
Osmunda regalis royal fern native 6  
Ostrya virginiana hophornbeam native 6 3
Oxalis corniculata creeping woodsorrel non-native 0 3
Oxalis dillenii common yellow oxalis native 2 3
Oxalis montana mountain woodsorrel native 6 3
Oxalis stricta common yellow oxalis native 2 3
Oxytropis campestris St. John oxytrope native 9  
Packera aurea golden ragwort native 5 -3
Packera paupercula balsam groundsel native 7 0
Packera schweinitziana Schweinitz's ragwort native 6 -3
Panax quinquefolius American ginseng native 7  
Panax trifolius dwarf ginseng native 6  
Panicum capillare witchgrass native 2 0
Panicum dichotomiflorum fall panicgrass non-native 0 -3
Panicum miliaceum broomcorn millet non-native 0  
Panicum philadelphicum Philadelphia panicgrass native 2 0
Panicum rigidulum redtop panicgrass native 4 -3
Panicum virgatum switchgrass native 4 0
Panicum virgatum var. spissum switchgrass native 2 0
Papaver rhoeas corn poppy non-native 0  
Papaver somniferum opium poppy non-native 0  
Pappophorum vaginatum whiplash pappusgrass non-native 0  
Parnassia glauca fen grass of Parnassus native 8 -5
Paronychia argyrocoma silverling native 9  
Parthenocissus quinquefolia Virginia creeper native 3 3
Parthenocissus tricuspidata Boston ivy non-native 0  
Parthenocissus vitacea woodbine native 5 3
Pastinaca sativa wild parsnip non-native 0  
Pedicularis canadensis Canadian lousewort native 4 3
Pedicularis furbishiae Furbish's lousewort native 10 -3
Peltandra virginica green arrow arum native 7 -5
Pennisetum glaucum pearl millet non-native 0  
Penstemon calycosus longsepal beardtongue non-native 0 3
Penstemon digitalis talus slope penstemon native 3 0
Penstemon hirsutus hairy beardtongue native 3  
Penstemon pallidus pale beardtongue non-native 0 5
Penstemon tubiflorus white wand beardtongue non-native 0  
Pentaglottis sempervirens evergreen bugloss non-native 0  
Penthorum sedoides ditch stonecrop native 3 -5
Persicaria vivipara alpine bistort native 10  
Petasites frigidus arctic sweet coltsfoot native 7 -3
Petasites frigidus var. palmatus arctic sweet coltsfoot native 7 -3
Petrorhagia saxifraga saxifrage pink non-native 0  
Petunia axillaris large white petunia non-native 0  
Petunia integrifolia violetflower petunia non-native 0  
Phacelia linearis threadleaf phacelia non-native 0  
Phacelia tanacetifolia lacy phacelia non-native 0  
Phalaris arundinacea reed canarygrass native 1 -3
Phalaris canariensis annual canarygrass non-native 0 3
Phaseolus vulgaris kidney bean non-native 0  
Phedimus spurius Caucasian stonecrop non-native 0  
Phedimus stoloniferus UNK non-native 0  
Phegopteris connectilis long beechfern native 4 3
Phegopteris hexagonoptera broad beechfern native 7 3
Philadelphus coronarius sweet mock orange non-native 0  
Phleum alpinum alpine timothy native 9 -3
Phleum pratense timothy non-native 0 3
Phlox maculata wild sweetwilliam non-native 0 -3
Phlox paniculata fall phlox non-native 0 3
Phlox stolonifera crepping phlox non-native 0  
Phlox subulata moss phlox non-native 0  
Photinia floribunda purple chokeberry native 3 -3
Photinia melanocarpa black chokeberry native 3 0
Photinia pyrifolia red chokeberry native 3 -3
Phragmites australis common reed non-native 0 -3
Phragmites australis ssp. americanus common reed native 6 -3
Phragmites australis ssp. australis common reed non-native 0 -3
Phyllodoce caerulea mountain heath native 10  
Physalis alkekengi strawberry groundcherry non-native 0  
Physalis heterophylla clammy groundcherry native 3  
Physalis longifolia longleaf groundcherry non-native 0  
Physalis virginiana Virginia groundcherry non-native 0  
Physocarpus opulifolius common ninebark non-native 0 -3
Physostegia virginiana obedient plant native 6 -3
Phytolacca americana American pokeweed native 2 3
Picea abies Norway spruce non-native 0  
Picea glauca white spruce native 3 3
Picea mariana black spruce native 6 -3
Picea pungens blue spruce non-native 0 3
Picea rubens red spruce native 3 3
Picris echioides bristly oxtongue non-native 0  
Pilea pumila Canadian clearweed native 4 -3
Pimpinella saxifraga solidstem burnet saxifrage non-native 0 3
Pinguicula vulgaris common butterwort native 10 -5
Pinus banksiana jack pine native 6 3
Pinus nigra Austrian pine non-native 0  
Pinus resinosa red pine native 5 3
Pinus rigida pitch pine native 6 3
Pinus strobus eastern white pine native 2 3
Pinus sylvestris Scots pine non-native 0  
Piptatherum canadense Canadian ricegrass native 5  
Piptatherum pungens mountain ricegrass native 6  
Piptatherum racemosum riceseed ricegrass native 7  
Pisum sativum garden pea non-native 0  
Plantago aristata largebracted plantain non-native 0  
Plantago lanceolata narrowleaf plantain non-native 0 3
Plantago major common plantain non-native 0 3
Plantago maritima goose tongue native 6 -3
Plantago media hoary plantain non-native 0  
Plantago patagonica woolly plantain non-native 0  
Plantago psyllium sand plantain non-native 0 3
Plantago rugelii blackseed plantain native 2 0
Plantago virginica Virginia plantain native 3 3
Platanthera ×andrewsii Andrew's bog orchid native 4 -5
Platanthera aquilonis northern green orchid native 4 -3
Platanthera blephariglottis white fringed orchid native 7 -5
Platanthera clavellata small green wood orchid native 4 -3
Platanthera dilatata scentbottle native 6 -3
Platanthera flava palegreen orchid native 5 -3
Platanthera grandiflora greater purple fringed orchid native 6 -3
Platanthera hookeri Hooker's orchid native 6 0
Platanthera huronensis Huron green orchid native 4 -3
Platanthera lacera green fringed orchid native 5 -3
Platanthera leucophaea prairie white fringed orchid native 10 -3
Platanthera macrophylla greater roundleaved orchid native 7 0
Platanthera obtusata bluntleaved orchid native 7 -3
Platanthera orbiculata lesser roundleaved orchid native 7 0
Platanthera psycodes lesser purple fringed orchid native 4 -3
Poa alsodes grove bluegrass native 5 0
Poa angustifolia Kentucky bluegrass non-native 0  
Poa annua annual bluegrass non-native 0 3
Poa compressa Canada bluegrass non-native 0 3
Poa glauca glaucous bluegrass native 9  
Poa laxa Mt. Washington bluegrass native 10  
Poa laxa ssp. fernaldiana Fernald's bluegrass native 9  
Poa nemoralis wood bluegrass non-native 0 3
Poa palustris fowl bluegrass native 3 -3
Poa pratensis Kentucky bluegrass non-native 0 3
Poa pratensis ssp. agassizensis bluegrass non-native 0 3
Poa pratensis ssp. angustifolia Kentucky bluegrass non-native 0 3
Poa pratensis ssp. pratensis Kentucky bluegrass non-native 0 3
Poa saltuensis oldpasture bluegrass native 4  
Poa saltuensis ssp. languida weak speargrass native 6  
Poa saltuensis ssp. saltuensis weak speargrass native 6  
Poa secunda Sandberg bluegrass non-native 0 3
Poa trivialis rough bluegrass non-native 0 -3
Podophyllum peltatum mayapple non-native 0 3
Podostemum ceratophyllum hornleaf riverweed native 7 -5
Pogonia ophioglossoides snakemouth orchid native 5 -5
Polemonium caeruleum charity non-native 0 -3
Polemonium vanbruntiae Vanbrunt's polemonium native 5 -3
Polygala paucifolia gaywings native 5  
Polygala polygama racemed milkwort native 3 3
Polygala sanguinea purple milkwort native 2 3
Polygala senega Seneca snakeroot native 6 3
Polygala verticillata whorled milkwort native 2 5
Polygala verticillata var. isocycla whorled milkwort native 2 5
Polygonatum biflorum smooth Solomon's seal non-native 0 3
Polygonatum pubescens hairy Solomon's seal native 6 3
Polygonella articulata coastal jointweed native 2  
Polygonum achoreum leathery knotweed native 2 3
Polygonum amphibium water knotweed native 5  
Polygonum arenastrum ovalleaf knotweed non-native 0  
Polygonum arifolium halberdleaf tearthumb native 5  
Polygonum aviculare prostrate knotweed non-native 0 3
Polygonum bellardii narrowleaf knotweed non-native 0  
Polygonum bistorta meadow bistort non-native 0  
Polygonum buxiforme American knotweed native 7  
Polygonum caespitosum Oriental lady's thumb non-native 0  
Polygonum careyi Carey's smartweed native 2  
Polygonum cespitosum Oriental lady's thumb non-native 0  
Polygonum cilinode fringed black bindweed native 5  
Polygonum convolvulus black bindweed non-native 0  
Polygonum cuspidatum Japanese knotweed non-native 0  
Polygonum douglasii Douglas' knotweed native 8 3
Polygonum erectum erect knotweed native 2 3
Polygonum fowleri Fowler's knotweed native 7 -3
Polygonum hydropiper marshpepper knotweed non-native 0  
Polygonum hydropiperoides swamp smartweed native 3  
Polygonum lapathifolium curlytop knotweed native 2  
Polygonum neglectum narrowleaf knotweed non-native 0  
Polygonum orientale kiss me over the garden gate non-native 0  
Polygonum pensylvanicum Pennsylvania smartweed native 2  
Polygonum persicaria spotted ladysthumb non-native 0  
Polygonum punctatum dotted smartweed native 5  
Polygonum ramosissimum bushy knotweed native 4 0
Polygonum sachalinense giant knotweed non-native 0  
Polygonum sagittatum arrowleaf tearthumb native 4  
Polygonum scandens climbing false buckwheat native 4  
Polygonum viviparum alpine bistort native 10  
Polypodium appalachianum Appalachian polypody native 6  
Polypodium virginianum rock polypody native 6  
Polypogon monspeliensis annual rabbitsfoot grass non-native 0 -5
Polystichum acrostichoides Christmas fern native 6 3
Polystichum braunii Braun's hollyfern native 8  
Pontederia cordata pickerelweed native 4 -5
Populus alba white poplar non-native 0  
Populus balsamifera balsam poplar native 2 -3
Populus deltoides eastern cottonwood non-native 0 0
Populus grandidentata bigtooth aspen native 2 3
Populus nigra Lombardy poplar non-native 0  
Populus tremuloides quaking aspen native 2 3
Portulaca oleracea little hogweed non-native 0 3
Potamogeton alpinus alpine pondweed native 7 -5
Potamogeton amplifolius largeleaf pondweed native 6 -5
Potamogeton bicupulatus snailseed pondweed native 6 -5
Potamogeton confervoides Tuckerman's pondweed native 8 -5
Potamogeton epihydrus ribbonleaf pondweed native 5 -5
Potamogeton foliosus leafy pondweed native 6 -5
Potamogeton friesii Fries' pondweed native 7 -5
Potamogeton gramineus variableleaf pondweed native 6 -5
Potamogeton natans floating pondweed native 5 -5
Potamogeton nodosus longleaf pondweed native 7 -5
Potamogeton oakesianus Oakes' pondweed native 7 -5
Potamogeton obtusifolius bluntleaf pondweed native 7 -5
Potamogeton perfoliatus claspingleaf pondweed native 5 -5
Potamogeton praelongus whitestem pondweed native 6 -5
Potamogeton pulcher spotted pondweed native 6 -5
Potamogeton pusillus small pondweed native 5 -5
Potamogeton pusillus ssp. tenuissimus small pondweed native 5 -5
Potamogeton richardsonii Richardson's pondweed native 7 -5
Potamogeton robbinsii Robbins' pondweed native 6 -5
Potamogeton spirillus spiral pondweed native 6 -5
Potamogeton strictifolius narrowleaf pondweed native 9 -5
Potamogeton vaseyi Vasey's pondweed native 6 -5
Potamogeton x mysticus UNK native 5 -5
Potamogeton zosteriformis flatstem pondweed native 6 -5
Potentilla argentea silver cinquefoil non-native 0 3
Potentilla arguta tall cinquefoil native 3  
Potentilla canadensis dwarf cinquefoil native 2  
Potentilla intermedia downy cinquefoil non-native 0  
Potentilla norvegica Norwegian cinquefoil native 2 0
Potentilla pensylvanica Pennsylvania cinquefoil native 2 3
Potentilla recta sulphur cinquefoil non-native 0  
Potentilla rivalis brook cinquefoil non-native 0 -3
Potentilla simplex common cinquefoil native 2 3
Prenanthes alba white rattlesnakeroot native 5 3
Prenanthes altissima tall rattlesnakeroot native 5 3
Prenanthes boottii alpine rattlesnakeroot native 10  
Prenanthes nana gall of the earth native 9  
Prenanthes racemosa purple rattlesnakeroot native 8 -3
Prenanthes trifoliolata gall of the earth native 5  
Primula laurentiana birdeye primrose native 9 0
Primula mistassinica Mistassini primrose native 9 -3
Primula veris cowslip primrose non-native 0  
Proboscidea louisianica ram's horn non-native 0 0
Proserpinaca palustris marsh mermaidweed native 5 -5
Prunella vulgaris common selfheal non-native 0 0
Prunus avium sweet cherry non-native 0 3
Prunus cerasus sour cherry non-native 0  
Prunus domestica European plum non-native 0  
Prunus maritima beach plum native 5  
Prunus nigra Canadian plum non-native 0 3
Prunus pensylvanica pin cherry native 2 3
Prunus persica peach non-native 0  
Prunus pumila sandcherry native 5  
Prunus pumila var. depressa eastern sandcherry native 6  
Prunus pumila var. susquehanae sand cherry native 6  
Prunus serotina black cherry native 3 3
Prunus spinosa blackthorn non-native 0  
Prunus susquehanae sand cherry native 5  
Prunus virginiana chokecherry native 2 3
Pseudognaphalium macounii Macoun's cudweed native 2  
Pseudognaphalium micradenium Heller's cudweed native 4  
Pseudognaphalium obtusifolium rabbit-tobacco native 2  
Pseudolysimachion longifolium long-leaved speedwell non-native 0  
Ptelea trifoliata common hoptree non-native 0 3
Pteridium aquilinum western brackenfern native 2 3
Puccinellia distans weeping alkaligrass non-native 0 -3
Puccinellia fasciculata saltmarsh alkaligrass non-native 0 -5
Puccinellia maritima seaside alkaligrass non-native 0 -5
Puccinellia nuttalliana Nuttall's alkaligrass non-native 0 -5
Puccinellia tenella tundra alkaligrass native 7 -3
Puccinellia tenella ssp. langeana tundra alkaligrass native 7 -3
Pueraria montana kudzu non-native 0 5
Pycnanthemum tenuifolium narrowleaf mountainmint native 4 0
Pycnanthemum virginianum Virginia mountainmint native 4 -3
Pyrola americana American wintergreen native 6 0
Pyrola asarifolia liverleaf wintergreen native 6 -3
Pyrola chlorantha greenflowered wintergreen native 6 3
Pyrola elliptica waxflower shinleaf native 5 3
Pyrola minor snowline wintergreen native 7 0
Pyrus communis common pear non-native 0  
Quercus alba white oak native 5 3
Quercus bicolor swamp white oak native 6 -3
Quercus coccinea scarlet oak native 6  
Quercus ilicifolia bear oak native 5  
Quercus macrocarpa bur oak native 6 3
Quercus palustris pin oak non-native 0 -3
Quercus prinus chestnut oak native 7 5
Quercus robur English oak non-native 0  
Quercus rubra northern red oak native 2 3
Quercus velutina black oak native 4  
Radiola linoides allseed non-native 0  
Ranunculus abortivus littleleaf buttercup native 6 0
Ranunculus acris tall buttercup native 2 0
Ranunculus bulbosus St. Anthony's turnip non-native 0 -3
Ranunculus cymbalaria alkali buttercup native 6 -5
Ranunculus fascicularis early buttercup native 7 3
Ranunculus flabellaris yellow water buttercup native 6 -5
Ranunculus flammula greater creeping spearwort native 5 -3
Ranunculus gmelinii Gmelin's buttercup native 6 -3
Ranunculus hispidus bristly buttercup native 4 0
Ranunculus lapponicus Lapland buttercup native 8 -5
Ranunculus pensylvanicus Pennsylvania buttercup native 3 -5
Ranunculus recurvatus blisterwort non-native 0 -3
Ranunculus repens creeping buttercup non-native 0 0
Ranunculus sceleratus cursed buttercup native 3 -5
Ranunculus trichophyllus longbeak buttercup native 6 -5
Raphanus raphanistrum wild radish non-native 0  
Raphanus sativus cultivated radish non-native 0  
Reseda alba white upright mignonette non-native 0  
Reseda lutea yellow mignonette non-native 0  
Rhamnus alnifolia alderleaf buckthorn native 6 -5
Rhamnus cathartica common buckthorn non-native 0 0
Rheum rhabarbarum garden rhubarb non-native 0  
Rheum rhaponticum garden rhubarb non-native 0  
Rhexia virginica handsome Harry native 6 -5
Rhinanthus minor little yellow rattle native 2 0
Rhinanthus minor ssp. groenlandicus arctic rattlebox native 2 0
Rhodiola rosea roseroot stonecrop native 8 3
Rhododendron canadense rhodora native 5 -3
Rhododendron lapponicum Lapland rosebay native 10 -3
Rhododendron maximum great laurel native 7 0
Rhododendron viscosum swamp azalea native 7 -3
Rhus copallinum winged sumac native 3 5
Rhus glabra smooth sumac native 2  
Rhus hirta staghorn sumac native 2  
Rhus pulvinata northern smooth sumac native 2  
Rhus typhina staghorn sumac native 2  
Rhynchospora alba white beaksedge native 6 -5
Rhynchospora capillacea needle beaksedge native 8 -5
Rhynchospora capitellata brownish beaksedge native 4 -5
Rhynchospora fusca brown beaksedge native 4 -5
Rhynchospora macrostachya tall horned beaksedge native 8 -5
Ribes americanum American black currant native 5 -3
Ribes cynosbati eastern prickly gooseberry native 6 3
Ribes glandulosum skunk currant native 4 -3
Ribes hirtellum hairystem gooseberry native 5 -3
Ribes lacustre prickly currant native 6 -3
Ribes nigrum European black currant non-native 0  
Ribes oxyacanthoides Canadian gooseberry native 5 3
Ribes rubrum cultivated currant non-native 0  
Ribes triste red currant native 6 -5
Ribes uva-crispa European gooseberry non-native 0  
Robinia hispida bristly locust non-native 0  
Robinia pseudoacacia black locust non-native 0 3
Robinia viscosa clammy locust non-native 0  
Rorippa amphibia great yellowcress non-native 0 -3
Rorippa palustris bog yellowcress native 4 -5
Rorippa sylvestris creeping yellowcress non-native 0 -5
Rosa acicularis prickly rose native 6 3
Rosa blanda smooth rose native 5 3
Rosa canina dog rose non-native 0  
Rosa carolina Carolina rose native 4 3
Rosa cinnamomea cinnamon rose non-native 0  
Rosa eglanteria sweetbriar rose non-native 0 3
Rosa ferruiginea redleaf rose non-native 0  
Rosa gallica French rose non-native 0  
Rosa micrantha smallflower sweetbrier non-native 0 3
Rosa multiflora multiflora rose non-native 0 3
Rosa nitida shining rose native 5 -3
Rosa palustris swamp rose native 4 -5
Rosa rugosa rugosa rose non-native 0 3
Rosa spinosissima Scotch rose non-native 0  
Rosa virginiana Virginia rose native 3 0
Rubus allegheniensis Allegheny blackberry native 2 3
Rubus amnicola upland blackberry native 2  
Rubus canadensis smooth blackberry native 4  
Rubus chamaemorus cloudberry native 8 -3
Rubus elegantulus showy blackberry native 4  
Rubus enslenii southern dewberry native 6  
Rubus flagellaris northern dewberry native 3 3
Rubus frondosus yankee blackberry native 2  
Rubus hispidus bristly dewberry native 2 -3
Rubus idaeus American red raspberry native 2 3
Rubus idaeus ssp. strigosus grayleaf red raspberry native 2 3
Rubus illecebrosus strawberry raspberry non-native 0  
Rubus occidentalis black raspberry native 2  
Rubus odoratus purpleflowering raspberry native 3  
Rubus pubescens dwarf red blackberry native 6 -3
Rubus recurvicaulis arching dewberry native 2  
Rubus semisetosus swamp blackberry native 2 0
Rubus setosus setose blackberry native 2 -3
Rubus vermontanus Vermont blackberry native 2  
Rudbeckia hirta blackeyed Susan non-native 0 3
Rudbeckia laciniata cutleaf coneflower native 7 -3
Rumex acetosa garden sorrel non-native 0 5
Rumex acetosella common sheep sorrel non-native 0 3
Rumex alpinus Monk's rhubarb non-native 0  
Rumex altissimus pale dock native 4 -3
Rumex aquaticus var. fenestratus western dock native 3  
Rumex britannica greater water dock native 5 -5
Rumex crispus curly dock non-native 0 0
Rumex longifolius dooryard dock non-native 0 0
Rumex maritimus golden dock native 7 -3
Rumex obtusifolius bitter dock non-native 0 0
Rumex occidentalis western dock native 4 -5
Rumex orbiculatus greater water dock native 5  
Rumex pallidus seaside dock native 5 -3
Rumex patientia patience dock non-native 0  
Rumex salicifolius willow dock native 3 0
Rumex salicifolius var. mexicanus Mexican dock native 6  
Rumex triangulivalvis Mexican dock non-native 0 0
Ruppia maritima widgeongrass native 7 -5
Sagina nodosa knotted pearlwort non-native 0 3
Sagina nodosa ssp. borealis knotted pearlwort native 6 3
Sagina nodosa ssp. nodosa knotted pearlwort non-native 0 3
Sagina officinalis UNK non-native 0  
Sagina procumbens birdeye pearlwort native 4 0
Sagittaria calycina hooded arrowhead native 8 -5
Sagittaria cuneata arumleaf arrowhead native 7 -5
Sagittaria filiformis threadleaf arrowhead native 6 -5
Sagittaria graminea grassy arrowhead native 6 -5
Sagittaria latifolia broadleaf arrowhead native 5 -5
Sagittaria rigida sessilefruit arrowhead native 7 -5
Salicornia bigelovii dwarf saltwort native 7 -5
Salicornia depressa Virginia glasswort native 5 -5
Salix alba white willow non-native 0 -3
Salix arctophila northern willow native 10 -3
Salix argyrocarpa Labrador willow native 9 3
Salix atrocinerea large gray willow non-native 0 -3
Salix bebbiana Bebb willow native 2 -3
Salix candida sageleaf willow native 8 -5
Salix cinerea large gray willow non-native 0 -3
Salix discolor pussy willow native 2 -3
Salix eriocephala Missouri River willow native 3 -3
Salix exigua narrowleaf willow native 7 0
Salix fragilis crack willow non-native 0 0
Salix herbacea dwarf willow native 10  
Salix humilis prairie willow native 3 3
Salix interior sandbar willow native 7 -3
Salix lucida shining willow native 3 -3
Salix myricoides bayberry willow native 7 -3
Salix nigra black willow native 5 -5
Salix pedicellaris bog willow native 7 -5
Salix pellita satiny willow native 6 -3
Salix pentandra laurel willow non-native 0  
Salix petiolaris meadow willow native 2 -3
Salix planifolia diamondleaf willow native 9 -5
Salix purpurea purpleosier willow non-native 0 -3
Salix pyrifolia balsam willow native 5 -3
Salix sericea silky willow native 4 -5
Salix uva-ursi bearberry willow native 10  
Salix viminalis basket willow non-native 0 -3
Salix x pendulina Wisconsin weeping willow non-native 0 -3
Salix x rubens hybrid crack willow non-native 0  
Salsola kali Russian thistle native 7 3
Salsola tragus prickly Russian thistle non-native 0 3
Salvia officinalis kitchen sage non-native 0  
Sambucus nigra ssp. canadensis American black elderberry native 3 -3
Sambucus racemosa red elderberry native 4 3
Samolus valerandi seaside brookweed native 7 -5
Samolus valerandi ssp. parviflorus seaside brookweed native 8  
Sanguinaria canadensis bloodroot native 7 3
Sanguisorba canadensis Canadian burnet native 5 -3
Sanguisorba minor small burnet non-native 0  
Sanguisorba officinalis official burnet non-native 0 -3
Sanicula marilandica Maryland sanicle native 6 3
Sanicula odorata clustered blacksnakeroot native 7 0
Sanicula trifoliata largefruit blacksnakeroot native 6  
Saponaria officinalis bouncingbet non-native 0 3
Sarracenia purpurea purple pitcherplant native 7 -5
Sassafras albidum sassafras native 4 3
Satureja hortensis summer savory non-native 0  
Saxifraga foliolosa leafystem saxifrage native 10 -5
Saxifraga paniculata ssp. neogaea White Mountain saxifrage native 10 0
Saxifraga pensylvanica eastern swamp saxifrage native 6 -5
Saxifraga virginiensis early saxifrage native 7 3
Schedonorus phoenix tall fescue non-native 0  
Schedonorus pratensis meadow fescue non-native 0 3
Scheuchzeria palustris rannoch-rush native 8 -5
Schizachne purpurascens false melic native 6 3
Schizachyrium scoparium little bluestem native 2 3
Schoenoplectus acutus var. acutus hardstem bulrush native 6 -5
Schoenoplectus fluviatilis river bulrush native 6 -5
Schoenoplectus maritimus cosmopolitan bulrush native 6 -5
Schoenoplectus novae-angliae New England bulrush native 9 -5
Schoenoplectus pungens common threesquare native 4 -5
Schoenoplectus pungens var. pungens common threesquare native 6 -5
Schoenoplectus purshianus weakstalk bulrush native 6 -5
Schoenoplectus robustus sturdy bulrush native 7 -5
Schoenoplectus smithii Smith's bulrush native 7 -5
Schoenoplectus subterminalis swaying bulrush native 6 -5
Schoenoplectus tabernaemontani softstem bulrush native 5 -5
Schoenoplectus torreyi Torrey's bulrush native 6 -5
Scirpus atrocinctus blackgirdle bulrush native 2 -5
Scirpus atrovirens green bulrush native 2 -5
Scirpus cyperinus woolgrass native 2 -5
Scirpus expansus woodland bulrush native 3 -5
Scirpus georgianus Georgia bulrush native 3 -5
Scirpus hattorianus mosquito bulrush native 2 -5
Scirpus longii Long's bulrush native 6 -5
Scirpus microcarpus panicled bulrush native 3 -5
Scirpus pedicellatus stalked bulrush native 2 -5
Scirpus pendulus rufous bulrush native 2 -5
Scirpus x peckii Peck's bulrush native 2 -5
Scleranthus annuus German knotgrass non-native 0 3
Scrophularia lanceolata lanceleaf figwort native 4 3
Scutellaria galericulata marsh skullcap native 4 -5
Scutellaria lateriflora blue skullcap native 5 -5
Scutellaria parvula small skullcap native 5 3
Scutellaria x churchilliana Churchill skullcap native 5 -3
Secale cereale cereal rye non-native 0  
Securigera varia crownvetch non-native 0  
Sedum acre goldmoss stonecrop non-native 0  
Sedum album white stonecrop non-native 0  
Sedum hispanicum Spanish stonecrop non-native 0  
Sedum ochroleucum European stonecrop non-native 0  
Sedum sarmentosum stringy stonecrop non-native 0  
Sedum spurium tworow stonecrop non-native 0  
Sedum stoloniferum stolon stonecrop non-native 0  
Sedum ternatum woodland stonecrop non-native 0 3
Selaginella apoda meadow spikemoss native 3 -3
Selaginella rupestris northern selaginella native 7  
Selaginella selaginoides club spikemoss native 10 -3
Sempervivum tectorum common houseleek non-native 0  
Senecio jacobaea stinking willie non-native 0 5
Senecio sylvaticus woodland ragwort non-native 0 5
Senecio viscosus sticky ragwort non-native 0  
Senecio vulgaris old-man-in-the-Spring non-native 0 3
Senna hebecarpa American senna non-native 0 -3
Sericocarpus asteroides toothed whitetop aster native 4  
Setaria faberi Japanese bristlegrass non-native 0 3
Setaria italica foxtail bristlegrass non-native 0 3
Setaria pumila yellow foxtail non-native 0 0
Setaria pumila ssp. pumila yellow foxtail non-native 0 0
Setaria verticillata hooked bristlegrass non-native 0 3
Setaria viridis green bristlegrass non-native 0  
Shepherdia canadensis russet buffaloberry native 9 5
Sherardia arvensis blue fieldmadder non-native 0  
Sibbaldiopsis tridentata shrubby fivefingers native 6  
Sicyos angulatus oneseed bur cucumber non-native 0 -3
Sida spinosa prickly fanpetals non-native 0 3
Silene antirrhina sleepy silene native 2  
Silene armeria sweet William silene non-native 0  
Silene csereii Balkan catchfly non-native 0  
Silene dichotoma forked catchfly non-native 0  
Silene dioica red catchfly non-native 0  
Silene gallica common catchfly non-native 0  
Silene latifolia bladder campion non-native 0  
Silene nivea evening campion non-native 0 -3
Silene noctiflora nightflowering silene non-native 0  
Silene nutans Eurasian catchfly non-native 0  
Silene pendula nodding catchfly non-native 0  
Silene vulgaris maidenstears non-native 0  
Silphium perfoliatum cup plant non-native 0 -3
Sinapis alba white mustard non-native 0 3
Sinapis arvensis charlock mustard non-native 0  
Sisymbrium altissimum tall tumblemustard non-native 0 3
Sisymbrium loeselii small tumbleweed mustard non-native 0  
Sisymbrium officinale hedgemustard non-native 0  
Sisyrinchium albidum white blue-eyed grass non-native 0 3
Sisyrinchium angustifolium narrowleaf blue-eyed grass native 3 0
Sisyrinchium atlanticum eastern blue-eyed grass native 3 -3
Sisyrinchium montanum strict blue-eyed grass native 2 0
Sisyrinchium mucronatum needletip blue-eyed grass native 2 0
Sium carsonii Carson's waterparsnip native 5 -5
Sium suave hemlock waterparsnip native 5 -5
Smilax herbacea smooth carrionflower native 6 0
Smilax rotundifolia roundleaf greenbrier native 3 0
Solanum carolinense Carolina horsenettle non-native 0 3
Solanum dulcamara climbing nightshade non-native 0 0
Solanum lycopersicum garden tomato non-native 0  
Solanum nigrum black nightshade non-native 0 3
Solanum ptycanthum West Indian nightshade native 3 3
Solanum rostratum buffalobur nightshade non-native 0  
Solanum tuberosum Irish potato non-native 0  
Solanum villosum hairy nightshade non-native 0  
Solidago altissima Canada goldenrod native 2 3
Solidago arguta Atlantic goldenrod native 5 3
Solidago bicolor white goldenrod native 2  
Solidago caesia wreath goldenrod native 6 3
Solidago canadensis Canada goldenrod native 2 3
Solidago cutleri Cutler's alpine goldenrod native 9  
Solidago flexicaulis zigzag goldenrod native 6 3
Solidago gigantea giant goldenrod native 2 -3
Solidago hispida hairy goldenrod native 4  
Solidago juncea early goldenrod native 2  
Solidago macrophylla largeleaf goldenrod native 7  
Solidago multiradiata Rocky Mountain goldenrod native 9 3
Solidago nemoralis gray goldenrod native 2  
Solidago puberula downy goldenrod native 3 3
Solidago rugosa wrinkleleaf goldenrod native 2 0
Solidago sempervirens seaside goldenrod native 4 -3
Solidago simplex Mt. Albert goldenrod native 4 3
Solidago simplex ssp. randii var. monticola Rand's goldenrod native 7 3
Solidago simplex ssp. randii var. racemosa Rand's goldenrod native 7 3
Solidago speciosa showy goldenrod native 7  
Solidago squarrosa stout goldenrod native 6  
Solidago uliginosa bog goldenrod native 7 -5
Solidago x asperula goldenrod native 4 -5
Sonchus arvensis field sowthistle non-native 0 3
Sonchus asper spiny sowthistle non-native 0 3
Sonchus oleraceus common sowthistle non-native 0 3
Sorbaria sorbifolia false spiraea non-native 0  
Sorbus americana American mountain ash native 6 0
Sorbus aucuparia European mountain ash non-native 0  
Sorbus decora northern mountain ash native 6 3
Sorbus hybrida oaskleaf mountain ash non-native 0  
Sorghastrum nutans Indiangrass native 3 3
Sorghum bicolor sorghum non-native 0 5
Sparganium americanum American bur-reed native 5 -5
Sparganium androcladum branched bur-reed native 7 -5
Sparganium angustifolium narrowleaf bur-reed native 6 -5
Sparganium emersum European bur-reed native 6 -5
Sparganium eurycarpum broadfruit bur-reed native 6 -5
Sparganium fluctuans floating bur-reed native 6 -5
Sparganium natans small bur-reed native 6 -5
Spartina alterniflora smooth cordgrass native 6 -5
Spartina patens saltmeadow cordgrass native 6 -3
Spartina pectinata prairie cordgrass native 4 -3
Spartina x caespitosa short cordgrass native 6 -5
Spergula arvensis corn spurry non-native 0  
Spergularia canadensis Canadian sandspurry native 6 -5
Spergularia marina salt sandspurry native 6 -3
Spergularia rubra red sandspurry non-native 0 3
Spergularia salina salt sandspurry non-native 0 -3
Sphenopholis intermedia slender wedgescale native 6 0
Spinacia oleracea spinach non-native 0  
Spiraea alba white meadowsweet native 2 -3
Spiraea alba var. latifolia white meadowsweet native 2 -3
Spiraea japonica Japanese meadowsweet non-native 0 5
Spiraea septentrionalis northern meadowsweet native 5 -3
Spiraea tomentosa steeplebush native 3 -3
Spiranthes casei Case's lady's tresses native 3  
Spiranthes cernua nodding lady's tresses native 2 -3
Spiranthes lacera northern slender lady's tresses native 3 0
Spiranthes lacera var. lacera northern slender lady's tresses native 5 0
Spiranthes lucida shining lady's tresses native 8 -3
Spiranthes ochroleuca yellow nodding lady's tresses native 3  
Spiranthes romanzoffiana hooded lady's tresses native 3 -5
Spirodela polyrrhiza common duckmeat native 3 -5
Sporobolus asper composite dropseed native 7  
Sporobolus compositus var. compositus composite dropseed native 7  
Sporobolus contractus spike dropseed native 1  
Sporobolus cryptandrus sand dropseed native 3 3
Sporobolus nealleyi gyp dropseed non-native 0  
Sporobolus neglectus puffsheath dropseed native 3 3
Sporobolus vaginiflorus poverty dropseed native 2  
Stachys annua annual hedgenettle non-native 0  
Stachys arvensis staggerweed non-native 0  
Stachys hispida smooth hedgenettle native 3  
Stachys hyssopifolia hyssopleaf hedgenettle non-native 0 -3
Stachys palustris marsh hedgenettle native 4 -5
Stachys tenuifolia smooth hedgenettle native 4 -3
Stellaria alsine bog chickweed native 5 -5
Stellaria borealis boreal starwort native 7 -3
Stellaria graminea grass-like starwort non-native 0 5
Stellaria holostea addersmeat non-native 0  
Stellaria humifusa saltmarsh starwort native 7 -5
Stellaria longifolia longleaf starwort native 4 -3
Stellaria media common chickweed non-native 0 3
Stellaria palustris meadow starwort non-native 0 0
Streptopus amplexifolius claspleaf twistedstalk native 7 0
Streptopus lanceolatus twistedstock native 7 3
Strophostyles helvola amberique-bean non-native 0 0
Stuckenia filiformis fineleaf pondweed native 8 -5
Stuckenia pectinata sago pondweed native 6 -5
Suaeda calceoliformis Pursh seepweed native 7 -3
Suaeda linearis annual seepweed native 6 -5
Suaeda maritima herbaceous seepweed non-native 0 -5
Suaeda maritima ssp. maritima herbaceous seepweed non-native 0 -5
Suaeda maritima ssp. richii Rich's seepweed native 7 -5
Subularia aquatica waterawlwort native 7 -5
Symphoricarpos albus common snowberry non-native 0 3
Symphyotrichum anticostense Anticosti aster native 7  
Symphyotrichum boreale northern bog aster native 7 -5
Symphyotrichum ciliolatum Lindley's aster native 2  
Symphyotrichum cordifolium common blue wood aster native 2  
Symphyotrichum ericoides white heath aster native 3 3
Symphyotrichum ericoides var. ericoides white heath aster native 2 3
Symphyotrichum laeve smooth blue aster native 2 3
Symphyotrichum lanceolatum white panicle aster native 2 -3
Symphyotrichum lanceolatum ssp. lanceolatum var. lanceolatum white panicle aster native 2 -3
Symphyotrichum lateriflorum calico aster native 2 0
Symphyotrichum lateriflorum var. lateriflorum calico aster native 2 0
Symphyotrichum novae-angliae New England aster native 2 -3
Symphyotrichum novi-belgii New York aster native 4 -3
Symphyotrichum novi-belgii var. novi-belgii New York aster native 4 -3
Symphyotrichum pilosum hairy white oldfield aster native 4 3
Symphyotrichum pilosum var. pilosum hairy white oldfield aster native 2 3
Symphyotrichum puniceum purplestem aster native 3 -5
Symphyotrichum puniceum var. puniceum purplestem aster native 3 -5
Symphyotrichum racemosum smooth white oldfield aster native 3 -3
Symphyotrichum subulatum eastern annual saltmarsh aster native 8 -3
Symphyotrichum tradescantii shore aster native 6 -3
Symphyotrichum undulatum wavyleaf aster native 2  
Symphytum asperum prickly comfrey non-native 0 5
Symphytum officinale common comfrey non-native 0  
Symphytum tuberosum tuberous comfrey non-native 0  
Symplocarpus foetidus skunk cabbage native 6 -5
Syringa vulgaris common lilac non-native 0  
Tanacetum balsamita costmary non-native 0  
Tanacetum bipinnatum Huron tansy native 7  
Tanacetum parthenium feverfew non-native 0  
Tanacetum vulgare common tansy non-native 0 3
Taraxacum laevigatum rock dandelion non-native 0  
Taraxacum officinale common dandelion non-native 0 3
Taxus canadensis Canada yew native 6 3
Teucrium canadense Canada germander native 4 -3
Thalictrum dioicum early meadow-rue native 7 3
Thalictrum pubescens king of the meadow native 2 -3
Thalictrum venulosum veiny meadow-rue native 8 -3
Thelypteris noveboracensis New York fern native 3 0
Thelypteris palustris eastern marsh fern native 3 -3
Thelypteris simulata bog fern native 4  
Thermopsis villosa Aaron's rod non-native 0  
Thinopyrum pycnanthum tick quackgrass non-native 0 -3
Thlaspi arvense field pennycress non-native 0 5
Thuja occidentalis arborvitae native 3 -3
Thymus pulegioides lemon thyme non-native 0  
Tiarella cordifolia heartleaf foamflower native 4 3
Tilia americana American basswood native 6 3
Tilia cordata littleleaf linden non-native 0  
Tilia platyphyllos largeleaf linden non-native 0  
Torreyochloa pallida var. fernaldii Fernald's false mannagrass native 6 -5
Torreyochloa pallida var. pallida pale false mannagrass native 6 -5
Toxicodendron radicans eastern poison ivy native 3 0
Toxicodendron rydbergii western poison ivy native 5 0
Toxicodendron vernix poison sumac native 6 -5
Tradescantia ohiensis bluejacket non-native 0 3
Tradescantia virginiana Virginia spiderwort non-native 0 5
Tragopogon dubius yellow salsify non-native 0  
Tragopogon porrifolius salsify non-native 0  
Tragopogon pratensis yellow goats-beard non-native 0  
Tragus berteronianus spiked bur grass non-native 0  
Tragus racemosus stalked bur grass non-native 0  
Triadenum fraseri Fraser's marsh St. Johnswort native 6  
Triadenum virginicum Virginia marsh St. Johnswort native 6  
Triantha glutinosa sticky tofieldia native 8 -5
Trichophorum alpinum alpine bulrush native 8 -5
Trichophorum cespitosum tufted bulrush native 7  
Trichophorum clintonii Clinton's bulrush native 9 3
Trichostema dichotomum forked bluecurls native 3 5
Trientalis borealis starflower native 3 0
Trifolium arvense rabbitfoot clover non-native 0  
Trifolium aureum golden clover non-native 0  
Trifolium campestre field clover non-native 0  
Trifolium dubium suckling clover non-native 0 3
Trifolium hybridum alsike clover non-native 0 3
Trifolium incarnatum crimson clover non-native 0  
Trifolium medium zigzag clover non-native 0  
Trifolium pratense red clover non-native 0 3
Trifolium repens white clover non-native 0 3
Triglochin gaspensis gaspe arrow grass native 8 -5
Triglochin maritima seaside arrowgrass native 7 -5
Triglochin palustre marsh arrowgrass native 8 -5
Triglochin palustris marsh arrowgrass native 8 -5
Trillium cernuum whip-poor-will flower native 8 0
Trillium erectum red trillium native 5 3
Trillium undulatum painted trillium native 6 3
Triodanis perfoliata clasping Venus' looking-glass native 4 3
Triosteum aurantiacum orangefruit horse-gentian native 5  
Triphora trianthophora threebirds native 5 3
Tripleurospermum maritimum false mayweed non-native 0 0
Tripleurospermum maritimum ssp. maritimum false mayweed non-native 0 0
Tripleurospermum perforatum scentless false mayweed non-native 0  
Trisetum melicoides purple false oat native 7  
Trisetum spicatum spike trisetum native 7 0
Triticum aestivum common wheat non-native 0  
Tsuga canadensis eastern hemlock native 3 3
Turritis glabra tower rockcress native 2  
Tussilago farfara coltsfoot non-native 0 3
Typha angustifolia narrowleaf cattail non-native 0 -5
Typha latifolia broadleaf cattail native 2 -5
Typha x glauca white cattail non-native 0 -5
Ulmus americana American elm native 2 -3
Ulmus glabra Wych elm non-native 0 3
Ulmus parvifolia chinese elm non-native 0 5
Ulmus procera English elm non-native 0  
Urtica dioica stinging nettle native 2 0
Urtica urens dwarf nettle non-native 0  
Utricularia cornuta horned bladderwort native 6 -5
Utricularia geminiscapa hiddenfruit bladderwort native 6 -5
Utricularia gibba humped bladderwort native 6 -5
Utricularia intermedia flatleaf bladderwort native 6 -5
Utricularia macrorhiza common bladderwort native 3 -5
Utricularia minor lesser bladderwort native 6 -5
Utricularia purpurea eastern purple bladderwort native 5 -5
Utricularia radiata little floating bladderwort native 6 -5
Utricularia resupinata lavender bladderwort native 7 -5
Uvularia sessilifolia sessileleaf bellwort native 3 3
Vaccaria hispanica cow soapwort non-native 0 5
Vaccinium angustifolium lowbush blueberry native 2 3
Vaccinium boreale northern blueberry native 8  
Vaccinium caesariense New Jersey blueberry native 5 -5
Vaccinium cespitosum dwarf bilberry native 7  
Vaccinium corymbosum highbush blueberry native 4 -3
Vaccinium fuscatum black highbush blueberry native 7 -3
Vaccinium macrocarpon cranberry native 5 -5
Vaccinium myrtilloides velvetleaf huckleberry native 3 -3
Vaccinium oxycoccos small cranberry native 7 -5
Vaccinium pallidum Blue Ridge blueberry native 6  
Vaccinium uliginosum bog blueberry native 7 0
Vaccinium vitis-idaea lingonberry native 7 0
Vahlodea atropurpurea mountain hairgrass native 9 -3
Valeriana officinalis garden valerian non-native 0  
Valeriana uliginosa marsh valerian native 8 -5
Valerianella locusta Lewiston cornsalad non-native 0  
Vallisneria americana American eelgrass native 6 -5
Ventenata dubia north African grass non-native 0  
Veratrum viride green false hellebore native 5 -3
Verbascum blattaria moth mullein non-native 0 3
Verbascum phlomoides orange mullein non-native 0  
Verbascum thapsus common mullein non-native 0 5
Verbena bracteata bigbract verbena non-native 0 3
Verbena hastata swamp verbena native 4 -3
Veronica agrestis green field speedwell non-native 0  
Veronica americana American speedwell native 5 -5
Veronica anagallis-aquatica water speedwell native 5 -5
Veronica arvensis corn speedwell non-native 0 3
Veronica austriaca broadleaf speedwell non-native 0  
Veronica beccabunga European speedwell non-native 0 -5
Veronica chamaedrys germander speedwell non-native 0 5
Veronica longifolia long-leaved speedwell non-native 0  
Veronica officinalis common gypsyweed non-native 0 3
Veronica peregrina neckweed native 2 0
Veronica persica birdeye speedwell non-native 0  
Veronica polita gray field speedwell non-native 0  
Veronica scutellata skullcap speedwell native 5 -5
Veronica serpyllifolia thymeleaf speedwell native 2 0
Veronica wormskjoldii American alpine speedwell native 10 0
Veronicastrum virginicum Culver's root non-native 0 0
Viburnum acerifolium mapleleaf viburnum native 5 5
Viburnum dentatum southern arrowwood native 4 0
Viburnum edule squashberry native 8 -3
Viburnum lantana wayfaringtree non-native 0  
Viburnum lantanoides hobblebush native 6 3
Viburnum lentago nannyberry native 4 0
Viburnum nudum var. cassinoides withe-rod native 4 -3
Viburnum opulus ssp. trilobum American cranberrybush native 5 -3
Viburnum opulus var. americanum American cranberrybush native 4 -3
Viburnum opulus var. opulus European cranberrybush non-native 0 -3
Vicia cracca bird vetch non-native 0  
Vicia faba horsebean non-native 0  
Vicia hirsuta tiny vetch non-native 0  
Vicia sativa garden vetch non-native 0 3
Vinca minor common periwinkle non-native 0  
Viola adunca hookedspur violet native 3 3
Viola affinis sand violet native 3 -3
Viola arvensis European field pansy non-native 0  
Viola blanda sweet white violet native 4 -3
Viola blanda var. palustriformis sweet white violet native 4 -3
Viola canadensis Canadian white violet native 8 3
Viola cucullata marsh blue violet native 2 -5
Viola labradorica alpine violet native 3 0
Viola lanceolata bog white violet native 4 -5
Viola macloskeyi ssp. pallens smooth white violet native 3 -5
Viola nephrophylla northern bog violet native 8 -3
Viola novae-angliae New England blue violet native 7 -5
Viola odorata sweet violet non-native 0  
Viola pallens smooth white violet native 3  
Viola pubescens downy yellow violet native 6 3
Viola renifolia white violet native 6 -3
Viola rotundifolia roundleaf yellow violet native 6 0
Viola sagittata arrowleaf violet native 2 0
Viola selkirkii Selkirk's violet native 7  
Viola sororia common blue violet non-native 0 0
Viola tricolor johnny jumpup non-native 0  
Viola x primulifolia primrose violet native 2 -3
Viscaria vulgaris clammy campion non-native 0  
Vitis aestivalis summer grape native 6 3
Vitis labrusca fox grape native 2 3
Vitis riparia riverbank grape native 3 0
Vitis x novae-angliae pilgrim grape native 3  
Vulpia bromoides brome fescue non-native 0 5
Vulpia myuros rat-tail fescue non-native 0 3
Vulpia octoflora sixweeks fescue native 2 3
Waldsteinia fragarioides Appalachian barren strawberry native 3  
Wisteria floribunda Japanese wisteria non-native 0  
Wolffia borealis northern watermeal native 4 -5
Wolffia brasiliensis Brazilian watermeal native 4 -5
Wolffia columbiana Columbian watermeal native 3 -5
Woodsia alpina northern woodsia native 9  
Woodsia glabella smooth woodsia native 9  
Woodsia ilvensis rusty woodsia native 7  
Woodsia obtusa bluntlobe cliff fern native 8  
Woodwardia virginica Virginia chainfern native 7 -5
Xanthium spinosum spiny cocklebur non-native 0 3
Xanthium strumarium rough cocklebur non-native 0 0
Xanthorhiza simplicissima yellowroot non-native 0 -3
Xyris difformis bog yelloweyed grass native 5 -5
Xyris montana northern yelloweyed grass native 5 -5
Xyris smalliana Small's yelloweyed grass native 7 -5
Zannichellia palustris horned pondweed native 5 -5
Zanthoxylum americanum common pricklyash non-native 0 3
Zea mays corn non-native 0  
Zizania aquatica annual wildrice native 5 -5
Zizania palustris northern wildrice native 5 -5
Zizia aurea golden zizia native 3 0
Zostera marina seawrack native 8 -5

 

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