Mollugo verticillata is an annual C4 herb (Ludwig et al. 2010), from a taproot, prostrate, stem repeatedly forked, forming mats to 40 cm wide.
Leaves in whorls of 3-8, stalk short, blade 1-3 cm long, to about 0.4 cm wide, narrow, widest above middle (oblanceolate), tapering to base, midrib depressed, conspicuous.
Flowers white to pale green, 0.4-0.5 cm wide, radially symmetrical, 5-parted, sepals free; stamens 3-4, ovary superior; inflorescence of 2-5 flowers at each node each on a stalk 0.5-1.5 cm long; blooms June-Nov.
Fruit dry, oval, 0.3 cm, seeds numerous.
Wetland status: FAC.
Frequency in NYC: Infrequent (but more common, than collections indicate).
Origin: Tropical America.
Habitat: Open, disturbed, moist soil, back dunes, gardens, tree pits, roadsides, ball fields.