Annual or sometimes perennial, densely hairy to glabrous herb. Branches up to 20 cm long. Leaves with 0.5 mm long, short-petiolate, subulate stipules; blades opposite, 3-8 x 1-5 mm, ovate to oblong or linear, slightly asymetric, obtuse, entire. Cyathia axillary, solitary, short-pedicellate; involucre 1 x 1 mm, glands obscurely toothed with white to pinkish appendages. Capsule 3-angled, 1-1.2 mm across, hairy or glabrous.