Herbs, 35-65 cm tall. Rhizome compact. Leaves basal and cauline, trifoliolate; leaflets adaxially green, mottled with brown when young, narrowly ovate or sublanceolate, 5-11 × 2-4.5 cm, leathery, abaxially glaucous, with numerous minutely appressed hairs, base moderately cordate, terminal leaflet with equal rounded lobes, lateral leaflets oblique with outer lobe large and obtuse or rounded, inner lobe smaller and rounded, margin slightly undulate, sparsely or closely spinulose-subserrulate, apex shortly acuminate. Panicle 12-30-flowered, 25-36 cm, lower peduncles 3-5-flowered. Pedicel ca. 2.5 cm, glabrous. Flowers large, ca. 4 cm in diam. Outer sepals caducous, green, 2-3 mm; inner sepals not appressed to petals, greenish, narrowly ovate, unequal, outer pair ca. 8 × 4.5 mm, inner pair ca. 10 × 4.5 mm. Petals pale yellow, much longer than inner sepals; spur strongly curved, subulate, elongated, lamina-less. Stamens prolonged, ca. 4.5 mm; filaments white, with slightly pink tinge; anthers green, ca. 3 mm; pollen green. Fruit unknown. Fl. Apr, fr. unknown.