Herbs, 28-42 cm tall. Rhizome compact. Leaves basal and cauline, trifoliolate; leaflets adaxially glossy, lanceolate, 8-11 × 3-4 cm, leathery, abaxially puberulent, adaxially glabrous, base cordate with an open sinus and acute lobes, terminal leaflet with equal rounded lobes, lateral leaflets oblique with outer lobe large and inner lobe smaller, margin undulate-sinuate and sparsely spinose-serrate, apex long acuminate. Flowering stem with 2 opposite trifoliolate leaves. Panicle loosely 25-32-flowered, 18-23 cm. Pedicel ca. 2 cm, glandular. Flowers yellow, large. Outer sepals caducous, black, white-margined, obovate, ca. 4.2 × 4 mm, apex emarginate; inner sepals pale yellow, elliptic or narrowly ovate, 10-12 × 5-6 mm, apex acute. Petals pale yellow, much longer than inner sepals, ca. 2 mm; spur strongly curved, subulate, elongated, basal lamina ca. 7 mm high. Stamens enclosed, yellow, ca. 4 mm; filaments ca. 1 mm; anthers ca. 3 mm, valved. Pistil ca. 5.5 mm; style ca. 3 mm. Fruit unknown. Fl. Apr, fr. unknown.
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