Leaves usually 1, 6-30 cm × 3-15 mm. Scape 15-70 cm, minutely scabrous. Flowers: tepals abruptly spreading at base, distinct, yellow with brown midvein, 5-13 mm; filaments parallel to style, 3-10 mm, dilated bases connate into nectariferous cup, cup with basal filament appendages arising from apex, appendages shallowly to strongly 2-cuspidate at apex, cusps linear; anthers 1.5-3 mm; ovary 2-3 mm; style 6 mm; pedicel 0.5-6.5 cm.