BotanyErect, curly grasses; 15–40 cm high.
Stems: puberulent, with recurved trichomes
Leaves: simple, linear; 5 to 20 m long, 2 mm wide; pointed, entire apex, puberulent or glabrous, only the evident coast; sub-sessile; lower deciduous.
Inflorescences: Sub-spiked; solitary in the axils of the leaves which reduce upwards in the axes becoming ribbed triangular bracts
Flowers: pedicels ca 0.3 mm long; calyx tubular to cupuliform, 1 mm long, 5-lobed, wolves oblong; corolla narrowly tubular, 1 to 2 mm long, dark purple; 5 wolves 3-lobed with the longest middle lobe, apically widened and glandular; stamens 4, dynamos, filaments inserted just below the middle of the tube, anthers free, inclusive, longitudinally dehiscent, the upper pair oblong, the lower pair short and sometimes sterile; ovary conical, 1 locular, 1-ovulated, sunk into a disc, tiny stigma included.
Fruit: oblique achene, ovate, 3 mm long, pointed, glabrous, deeply carved-tuberculate.
Seeds: 1, with the embryo straight.