Chamaesyce polygonifolia is an annual herb (Duncan and Duncan 1987), mat forming, prostrate to ascending, hairless, sap milky, poisonous, stems to 25 cm long, often pink or red, branches forking, rooting at nodes, propagating vegetatively if broken (Silberhorn 1982).
Leaves opposite, 08.-1.5 cm long, linear to lance-shaped, pale matte gray-green, margin entire, base slightly unequal.
Flowers very small, in cup-like bracts with 4-5 petal-like lobes, in axillary (see E. maculata); blooming and fruiting July-Oct.
Fruit dry capsule 0.3 cm long with 3 rounded lobes, 3-seeded (Duncan and Duncan 1987).
Wetland status: FACU.
Frequency in NYC: Infrequent.
Habitat: Beaches above wrack line.