Spergularia marina is an annual herb to 35 cm, branched or simple, often prostrate, sometimes minutely hairy; stipules membranous, white, encircling leaf bases at node, lobe between leaf bases to 0.4 cm high.
Leaves opposite, fleshy, linear, 0.5-4 cm long, about 0.1 cm wide.
Flowers pink or white, 5-parted, sepals green, 0.3-0.5 cm long, sometimes hairy, petals shorter than sepals, white to pink, stamens 2-5, yellow, ovary above corolla, flowers open only in sun, seed production occurs even in closed flowers (Redbo-Tortensson 1994).
Fruit dry, hollow, a 3 sided capsule about 0.4 cm, splitting open to release with numerous seeds less than 0.1 cm long; blooms and fruits June-Oct.
Wetland status: OBL.
Frequency in NYC: Infrequent.
Habitat: Disturbed patches of high salt marsh, salted roadsides. (Accessed 4/2014).