S. nodosa: tufted, often flowering the first year; stems numerous, decumbent, or nearly erect, 2-4 inches high, sparingly branched; leaves small, subulate, those of the stem much shorter, with little clusters of minute ones in their axils; flowers pedicellate, few on each stem, conspicuous, the white obovate petals being twice as long as the calyx; sepals obtuse; the parts of the flower usually in fives, with ten stamens. - Wet sandy places. Fl. July, August.