Plants 120-200 mm long. Stem short and hidden or up to 25 mm long. Basal leaf more or less 3-angled, almost T-shaped in transverse section, with only two wide stomatiferous grooves, 110-200 x 1.5-2.5 mm, minutely ciliate on the rib margins. Inner bract wholly membranous, sometimes with reddish veins. Flowers 25-38 mm long, white, each segment with a large black, yellow-margined blotch in the throat, outer segments bright green on the backs. Style 10-12 mm; stigmas reaching halfway up the anthers or to the tips.
Cormous geophyte, 4-6 cm, corm with an oblique basal ridge, basal ridge fibrous, stem branching above ground. Basal leaf solitary, with 2 grooves. Flowers white with black cup edged in yellow, inner bracts papery.