Hackelia deflexa (Wahlenb.) Opiz ssp. americana (Gray) A. & D. Löve
Habitat: Rich woods. [Hardwood to mixed forest (forest, upland)]
Range: Quebec to Manitoba, British Columbia, Iowa, Nebraska and Wyoming. Also in Europe and Asia.
Aids to Identification: Northern stickseed grows 0.3-1 m high, with oblong, roughly hairy leaves 5-15 cm in length which occur alternately along the stem. It produces a branched cluster of tiny bluish-white flowers.
Ecological characteristics: Found on bluffs and in rocky woods. The name derives itself from the small bur-like fruit which sticks to clothing and animal fur.
Phenology: Flowers in late June.
Synonyms: Hackelia americana (Gray) Fern.; Hackelia deflexa (Wahlenb.) Opiz. var. americana (Gray) Fern. & I.M. Johnson; Lappula americana (Gray) Rydb.; Lappula deflexa (Gray) Rydb. ssp. americana (Gray) Hultén; Lappula deflexa (Gray) Rydb. var. americana (Gray) Greene.
Known Distribution in Maine: This rare plant has been documented from a total of 2 town(s) in the following county(ies): Oxford.
Reason(s) for rarity: Southern edge of its range.
Conservation considerations: Known populations are small, and subject to the vagaries of small populations like random fluctuations or localized disturbance events.