stem procumbent or erect, much branched; branches glabrous or downy; leaves opposite, lanceolate, acute, glabrous, or puberulous; stipules 2–4-parted, lobes subulate; flowers axillary, subverticillate, 4–5-androus; fruit obovate-oblong; mericarps convex at back, glabrous, or papillate. Stem 1–3 feet; as well as the branches, reddish-brown. Leaves sessile, 1–1 1/2 inch long, 2–3 lines long, in var. β, 3/4–1 inch long, about 4 lines broad, with slightly recurved margins, acute or acuminate, paler beneath, in var. β, on the under side with brown resinous dots. Corolla with conical tube, and lanceolate-linear lobes. Anthers oblong. Fruit 1 line long. Very similar to A. hirtum, of which it has the habit and foliage; but the stipules are very different, and the leaves somewhat broader. In this species I often found female flowers on the lower twigs.
