S. arvensis: annual; stems 1/2-1 foot high, slender, branching at the base, erect or ascending, glabrous or slightly downy; leaves almost subulate, 1-2 inches long, 6-8 together in two opposite clusters, and spreading so as to appear whorled; flowers small, white, on long slender pedicels, turned down after flowering, in terminal, forked cymes; stamens frequently ten or five in different flowers of the same plant; seeds slightly flattened, with or without a narrow scarious border. - Cornfields. Fl. June to August.