Scleranthus annuus is an annual herb, low growing, spreading to 15 cm.
Leaves opposite, stalkless, linear, 0.5-2.5 cm long, fleshy, bases fused (connate).
Flowers without petals, calyx green with white edge, 5-lobed, tiny, anthers yellow, much smaller than sepals (Yatskievych 2006); inflorescence branched, of compact clusters; blooming March-Oct..
Fruit dry, topped by persistent calyx, 1-seeded.
Wetland status: FACU-.
Frequency in NYC: Infrequent.
Habitat: Open areas on disturbed, dry soil, sand or fill.