Annual, erect herb. Stem slender, circular, young branches usually puberulous, otherwise glabrous. Leaves 6 in a whorl, 6-8 x 1-3 mm, narrowly linear, basal leaves obovate-oblanceolate, base of the upper leaves setaceous, revolute, glabrous-puberulous. Inflorescence of axillary and terminal cymes; peduncle 10-20 mm long, few-flowered; pedicel 3-6 mm long, filiform, glabrous. Flowers minute. Corolla white, lobes shortly apiculate or submuticous. Fruit subglobose, c. 1 mm in diameter, brownish, covered with short appressed white hairs, rarely glabrescent, mericarps mottled.