Small, stemless, 2-3 cm high. Bulb ovoid or at length subglobose, up to 3 cm long, attenuate-acute at the apex: tunics dark brown,'with soft brown ascending hairs at the apex. Rhizome about 7 cm long, often reddish. Leaves 2-6, subprostrate: petioles 1-2 cm long, sparsely and minutely pilose, dilated below the basal articulation: leaflets 3, sessile, broadly rotund, slightly cuneate-attenuate at the base, emarginate (the lateral sometimes entire), 4.5-9 mm long, 6-11 mm broad, glabrous, dark green above, deep purple beneath, with numerous minute transparent red dots or glands. Peduncles 1-fld., 2-4 mm long, deflexed and lengthening after flowering, reddish, sparsely pilose: bracts near the base, lanceolate, conduplicate, alternate or subopposite, 3-3.5 mm long, ciliate near the base, with elongate orange calli particularly on the upper part. Sepals narrow-obovate, acute or obtuse, 4-4.5 mm long, glabrous or sparsely pubescent, with numerous orange calli near the margins. Corolla 2.5-3.5 cm long, white, with a funnel-shaped yellow tube: laminae of the petals broadly cuneate-obovate, subtruncate, 1.2-1.5 cm broad, conspicuously violet-dotted near the outer margin, longer than the tapering claw. Filaments, the shorter3-4-5 mm, the longer 4-5-7 mm long, sparsely and minutely pilose, with longish acute teeth. Ovary pubescent and rubro-callose on the upper half, the chambers 6-ovuled: styles pubescent below, glandular-pilose above. Capsule globose. Seeds endospermous.
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Like O. melanosticta but smaller, 20-30 mm tall, bulb tunics pilose with brown hairs at apex, leaflets very dark green above, deep purple beneath, with numerous, minute, translucent red dots or glands, bracts alternate or subopposite near base of peduncle, flowers white with purple margin.