Shrub or small tree, the branchlets terete, glabrous. Leaves large, 4-foliolate; petioles elongate, about 10 cm. long, subterete, glabrous; rachis like petiole, about 7 cm. long, bearing a prominent subconic gland between the basal leaflets and a smaller apical gland or protuberance; stipules linear, caducous; leaflets ovate to elliptic, up to 25 cm. long and 7 cm. wide, obtuse or rounded basally, acuminate apically into a caudate tip about 3 cm. long, glabrous above and below; petiolules about 5 mm. long, dark, rugose. Inflorescence axillary or terminal, paniculate, several-flowered, puberulent; bracts linear, inconspicuous, about 2 mm. long; pedicels slender, up to 4 cm. long. Flowers yellow, large and showy; sepals un- equal, ovate to oblong-orbicular, up to 9 mm. long and 7 mm. wide, blunt or rounded, puberulent; petals mostly obovate, up to 3 cm. long and 17 mm. wide, venose, puberulent on the veins; fertile stamens 7; the 3 lowermost with large, oblong, markedly falcate anthers almost 1 cm. long, apically long-rostrate and dehiscent by a pair of terminal pores; 4 median anthers oblong, about 7 mm. long, only slightly falcate, short-rostrate, dehiscent by a pair of terminal pores; ovary linear, tomentose. Legume not known in maturity; seeds transverse.