Veronica americana is a perennial herb from rhizomes, stems to 1 m long, rather fleshy, creeping to erect, smooth.
Leaves opposite, stalk to 1 cm long, blade to 8 cm long, 3 cm wide, lance-shaped, the lower sometimes elliptic, tip blunt, base truncate, margin toothed to almost smooth.
Flowers blue, to 1 cm wide, corolla and calyx deeply 4-lobed; inflorescences in axils, long-stalked, unbranched, arching, with 10-15 flowers, each above a small, alternate, leaf-like bract; blooms June-Aug (Hough 1983).
Fruit dry, a 2-parted capsule to 0.3 cm long, about as wide, above old calyx, swollen, scarcely notched at top, seeds numerous; June-Aug..
Wetland status: OBL.
Frequency in NYC: Very infrequent.
Origin: Native and ne. Asian.
Habitat: Swamps, stream banks.