Herbs, 30-40 cm tall. Rhizome long creeping, slender, 2-3 mm in diam. Leaves basal and cauline, trifoliolate; leaflets adaxially dark green, narrowly ovate, 5-11 × 3.5-5 cm, leathery, abaxially glaucous, with long multicellular hairs or subglabrous, base cordate with a narrow or open sinus, lobes of terminal leaflet equal and obtuse, those of lateral leaflets unequal, with inner one smaller and rounded or obtuse, outer one longer and acute, margin closely spinulose-subserrulate, apex acuminate or sometimes acute. Flowering stem with 2 opposite leaves. Inflorescence simple, 5-11-flowered, 7-12 cm. Pedicel 1-2 cm, glandular hairy. Flowers yellow, large. Outer sepals caducous, 4-5 mm, with white margins; inner sepals appressed to petals, yellowish, ovate or narrowly oblong, 10-11 × 6-7 mm, apically acute. Petals pale sulfur-yellow, much longer than inner sepals, lamina-less; spur strongly curved, subulate, elongated, 2-2.5 cm. Stamens exposed, pale yellow, ca. 5 mm; filaments ca. 1 mm; anthers ca. 3.5 mm. Pistil ca. 7 mm. Fruit unknown. Fl. Apr-May, fr. unknown.
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