Perennial with ± extensive rhizomes. Stems weak and thin, caespitose, (50-)70-200(-300) mm long, with many, often short lateral branches, covered with ± long white spreading hairs or glabrous. Leaves in whorls of 4-6, 1-nerved, 3-5(-6) x (0.7-)0.8-1 mm, linear-lanceolate to lanceolate, ± acuminate at apex, with ± long white spreading hairs on upper and lower surface or at least on margins, occasionally subglabrous. Inflorescence extremely reduced; flowers solitary, subtended by a whorl of bracts, axillary or terminal on short lateral branches; pedicels (0.5-)1(-2) mm long, ± thickish, hairy or glabrous, ± arcuate in fruit. Flowers: corolla c. 1-1.5 mm in diam., hairy outside, whitish, lobes longer than wide, acute; stamens very short. Fruit covered with lone ± straight hairs or subglabrous and wrinkled; mericarps reniform, each c. 1-1.5 mm long.
Perennial herb, up to 0.3 m high. Leaves in whorls of 4-6, opposite, linear-lanceolate to lanceolate, with ± long, white, spreading hairs on both sides, apex acuminate, margins entire. Flowers solitary, subtended by bracts; pedicels up to 2 mm long. Corolla up to 1.5 mm in diam., whitish, pubescent outside; stamens very short. Flowering time Dec. Fruit covered with long hairs, wrinkled; mericarps reniform, up to 1.5 mm long.