Drosera filiformis is a carnivorous perennial herb to 25 cm tall.
Leaves all basal, linear thread-like, covered with long, purple, sticky, glandular hairs adapted to attract and trap insects that are digested by enzymes to supply the plant with nitrogen in nutrient-poor, acid bog habitats.
Flowers pale purple, radially symmetrical, to 1.5 cm wide, petals 5, sepals glandular-hairy, ovary superior; 4-16 flowers along one side on a stalk to 22 cm long; blooms July-Sept.
Fruit dry, a capsule with many small, black seeds.
Wetland status: OBL.
Frequency in NYC: Very infrequent.
Habitat: Open wet, acid, sandy soil or shallow water. A pine barrens plant.