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Herb, woody below, c. 1 m. Stem often branched, puberulous or hoary. Leaves elliptic lanceolate, 3-5 by 0.5-1 cm, acuminate, base attenuate, narrowed into the petiole, coarsely serrate, glabrous above, puberulous and dark glandular beneath; petiole 0.5 cm. Verticillasters 2-12-flowered, closely apart, secund, in spike-or panicle-like inflorescences, 5-12 cm long. Bracts lanceolate, 1-2.5 mm. Calyx urceolate, 1.5-2 mm long, in fruit 2-3 mm, glandular pubescent without; mouth of fruiting calyx slightly contracted; teeth erect, lanceolate. Corolla campanulate, yellowish green or whitish, 2.5-3 mm long, 2-lipped, sparingly pubescent. Stamens in 2 pairs, subequal; filaments pubescent. Nutlets broadly ellipsoid, flattened, c. 0.7 mm long.
A slender herb. It grows 30-150 cm high. The stems are square and branched. They are hairy. The leaves are opposite and oval. They have teeth along the edge. They are smooth on the upper surface and hairy underneath. The leaves are 3-8 cm long and 1.5-2 cm wide. The flower panicle can be at the ends of branches or in the axils of leaves. They are 6-12 cm long. The flowers are very small and white. The fruit are small nuts 0.7 mm long.
