Erect, often decumbent-ascending, perennial herb, 0.1-0.27 m high; glabrous to scabrid, branching, internodes tubular. Leaves crowded at nodes, linear to spathulate. Inflorescences elongating racemes, up to 100 mm long; peduncles strongly ribbed. Flowers white; bracts longer than flowers. Petals 2, as long as sepals, deciduous. Ovary ovoid, ± 3 mm long; carpels 4 or 5, not completely fused at top, with 4 or 5 apical, conical teeth bearing stigmatic surfaces; ovules 7-9 per placenta, in 2(3) rows. Fruit an ovoid-oblong capsule, membranous, gaping at top. Seeds many, ovoid-globular, black; testa glossy.
Perennial herb. Stems decumbent or procumbent, up to 0.5 m long. Leaves scattered or densely crowded; blade subulate-linear to narrowly spathulate, 6-15 x 0.5-1.0 mm. Flowers: bracts subtending adult flowers longer than flowers; petals ± as long as sepals, white; Jul.-Jun.