Leaves few, the lower 2–3 entirely sheathing (cataphylls); the foliage leaves lanceolate, slightly plicate, the lowermost basal and attached to the stem near ground level, the upper foliage leaves cauline and smaller.
Flowers white, actinomorphic, with a long perianth tube; tepals subequal, or the uppermost tepal somewhat hooded.
Perennial herbs with small globose corms, aerial pans dying back annually; corm tunics membranous to fibrous.
Style included in the perianth tube, filiform, 3-branched, the branches deeply divided and recurved.
Stamens included in the perianth tube, unilateral and pressed against the adaxial part of the tube.
Capsules oblong, coriaceous, showing the outline of the seeds.
Seeds several per locule, globose, hard, more or less smooth.
Inflorescence a spike; bracts green, fairly large.
Stem compressed and winged, unbranched.