Plants 7-35 cm tall. Stem erect to ascending, ribbed. Leaves 1-4 cm long, glabrous to scabrid, in clusters, with 1-2 minute basal lobes, c. 1 mm long. Flowers bisexual, in dense, 2-25 cm long spikes; bracts 1-1.5 mm long, linear to lanceolate, persistent. Sepals 4, subequal, 1-1.5 mm long, connate at the base. Petals 2, united more than half way up or free. Stamens 3-4, sometimes abortive; filaments united at the base, c. 1.5 mm long. Capsule erect, subglobose, c. 3 mm broad; teeth acute, c. 1 mm long, membranous. Seeds less than 1 mm long, greenish-black, glaucous.