Perennial herb, geophyte, 0.10-0.45 m high; corm tunics black, coarsely reticulate; stem erect, often several-branched. Leaves 2 or 3, linear, canaliculate. Spathes herbaceous, apex becoming dry. Inflorescence with blue or white flowers; nectar guides yellow; tepals subequal, spreading, claws form narrow cup, outer 23-40 mm long, inner 18-35 mm long. Stamens: filaments united in slender, minutely papillate column; anthers 5-7 mm long, diverging; pollen yellow. Ovary 5-7 mm long; style branches diverging, 4-5 mm long, apically forked, crests lacking. Flowering time Aug.-Nov. Capsule obovoid.
Cormous geophyte, 15-60 cm, stem often much branched. Leaves several, linear, channelled. Flowers blue or white, tepals cupped below, style crests vestigial.