Family, Madder. Color, white. Corolla, wheel - shaped, with 4 lobes shorter than the calyx. Calyx, 4-lobed. Stamens, 4. Style, often none, but 2 sessile stigmas. Parts of the flower sometimes in fives. Leaves, opposite, oblong or ovate, sessile, with stipules united to the petioles.

Annual, with smooth, branched stem less than a foot high, with many flowers clustered in the leaf-axils. Near the coast in wet ground from New York to Florida and westward.