Epilobium ciliatum is a perennial herb from persistent basal rosettes, stems solitary, slender, branched, to 1 m or more (or only to 40 cm, in Fernald), finely hairy above, stems of inflorescence often glandular.
Leaves opposite, sometimes becoming alternate above, lance-shaped, to 12 cm long, 3.5 cm wide, margin sparsely toothed.
Flowers white to pink, radially symmetrical, petals 4, to 0.6 cm long, deeply notched at tip; blooms and fruits June-Sept.
Fruit dry, a 4-parted capsule, linear, to 10 cm long (to 3 cm in Fernald), seeds numerous, white-plumed, evidently wind-dispersed.
Wetland status: FAC-.
Frequency in NYC: Very infrequent.
Habitat: Moist to wet soil, often in unstable habitats. May be extirpated in NYC.