Silene armeria is an annual herb, to 70 cm tall, mostly hairless, sometimes waxy gray-green.
Leaves opposite, egg-shaped, stalkless, clasping stem, to 5×1.5 cm.
Flowers purple-pink, ca 1.3 cm wide across top, 5 petals, with small appendages on upper surface, calyx tubular, to 1.7 cm long, 10-veined, above small pale bracts; inflorescence showy, terminal, crowded, branched; blooming June to frost.
Fruit a dry capsule to 0.8 cm long.
Wetland status: UPL
Frequency in NYC: Very infrequent.
Habitat: Garden plant, rarely escaping in open disturbed soil, fill. S