Blephilia hirsuta is a perennial herb, to 80 cm tall, stems 4-sided, long-hairy, colonial from rhizomes.
Leaves opposite, stalks 1-2 cm, blade 4-8 cm long, egg-shaped, margin toothed tip pointed, base rounded to slightly lobed,.
Flowers pale blue with purple spots, tubular, bilaterally symmetrical, 2-lipped, hairy, tube elongate, to 1.4 cm long, in dense, crowded clusters surrounding stem along upper nodes, above small bracts.
Fruit dry, of 4 nutlets, June-Sept.
Wetland status: UPL.
Frequency in NYC: Very infrequent.
Habitat: Moist shady habitats.
Notes: Found more often north and west of NYC metro region.