Galium tinctorium is a perennial herb, stems slender, to 40 cm long, much branched, matted, roughened by minute back-pointing hooks.
Leaves in whorls of 4-6, 1-2 cm long, narrow, tips blunt.
Flowers whitish, minute, four-parted, 0.1 cm, in clusters of 2-3 on stalks less than 1 cm long, at ends of stems; blooms June-Sept.
Fruit dry 2-parted capsule 0.2-0.3 cm on stalk to 0.5 cm.
Wetland status: OBL.
Frequency in NYC: Very infrequent.
Habitat: Marshy sites in circumneutral to alkaline soil.