Triadenum virginicum Perennial herb, to 60 cm tall, colonial from rhizomes, stems slender, branched near top or unbranched, winter stems is a park reddish, fruit capsules persistent.
Leaves opposite, stalkless, oblong, often purplish to 6 cm long, 2 cm wide, tip rounded, base slightly lobed, sprinkled with tiny glandular dots.
Flowers radially symmetrical, pinkish, to 2 cm wide, 5 petals, 5 sepals narrow, pointed, ovary superior, stamens 9, yellow; inflorescences of small axillary or terminal clusters.
Fruit dry, 3-parted capsules, cylindrical, to 1.2 cm long, topped with persistent styles, seeds small.
Wetland status: OBL.
Frequency in NYC: Infrequent.
Habitat: Wet open areas, pond edges, clean, undisturbed marshes.