Galium obtusum Bigelow
Habitat: Low woods, swamps, swampy thickets, moist meadows, and wet shores.
Range: Nova Scotia and southern Quebec to Minnesota and South Dakota, south to Florida and Texas.
Phenology: Flowers May to July.
Synonyms: Represented in Maine and New England by ssp. obtusum. Synonyms include Galium obtusum Bigelow var. ramosum Gleason; Galium trifidum L. var. latifolium Torr.
Known Distribution in Maine: This rare plant has been documented from a total of 1 town(s) in the following county(ies): Washington. This record is based on an 1885 collection by Kidder. The species is believed to be extirpated from Maine.
Dates of documented observations are: 1885