Rather robust, 4-20 cm high, entirely glabrous, the stem sometimes shortly exserted. Bulb ovoid, acute or subrostrate at the apex, up to 2.5 cm long; tunics rather thin, blackish, easily separable, or pale brown on the younger bulbs. Rhizome usually thick in the upper part, 20 cm long or more, with large amplexicaul scales. Stem not exserted or up to 10 cm long, sometimes with a few scales, or in shade plants leafy. Leaves often numerous, rosulate or more or less loosely imbricate on the stem; petioles 2-11 cm long, broadly dilated, scale like, brown and nerved below the basal articulation; leaflets 3, shortly petiolulate, linear or oblong, tapering at the base, incised at the apex, sometimes conduplicate, 1.2-2.7 cm long, 2-7 mm broad, with 2 small, brown apical calli. Peduncles 1-fld., terminal, 2-12 cm long, with 3 large oblong-lanceolate carinate bracts closely adpressed to the calyx. Sepals oblong-lanceolate, somewhat obtuse, 7-11 mm long, usually ecallose. Corolla 2-3 cm long, bright yellow, with a short, broad tube; laminae of the petals obliquely cuneate-obovate, subtruncate, 1-1.7 cm broad, 4-5 times longer than the attenuate claw. Filaments glandular-pilose, the shorter 2.5-4.5 mm, the longer 5.5-7.5 mm long, with short, rather obtuse teeth. Ovary glabrous, the chambers 2-3-ovuled; styles densely glandular-pilose. Capsule subglobose, shorter than the calyx. Seeds without endosperm.
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Like O. louisae but up to 200 mm tall, petiole terete but scale-like and brown near base, leaflets at least 4 times as long as broad, sometimes conduplicate, with 2 small, brown, apical calli, flowers bright yellow, with 3 large oblong-lanceolate bracts close to calyx.