Trees, 6-9 m tall. Branchlets brown tomentose. Leaf peti­ole 2-3.5 cm, with gland at base of petiole and junction of first pinnae; rachis 10-20 cm, brown tomentose; pinnae 8-16 pairs, opposite or subopposite, 5-10 cm, subsessile; leaflets 13-27 pairs, subfalcate-oblong, 5-10 × 1.5-3 mm, abaxially pubes­cent, adaxially glabrous, midvein close to upper margin, base truncate, apex acute. Heads 6.5-7.5 cm in diam., 40-50-flow­ered; peduncles 7-10 cm, brown tomentose, with a gland apart from head ca. 1 cm. Calyx 6-6.5 mm, 5-toothed. Corolla yel­low-white, 1-1.2 cm, pubescent. Stamens numerous, spreading, 3-3.8 cm; filaments marginally white, centrally golden yellow, basally connate into a tube 7-8 mm. Ovary linear, subglabrous, sessile. Legume dehiscent, ligulate, flat, 10-14 × ca. 1.5 cm, densely tomentose, margin thickened. Seeds 6-10, oblong, ca. 5 × 3 mm; pleurogram parallel to margins of seed. Fl. Mar, fr. Sep.

Dense forests; 1200-1900 m. Xizang, Yunnan [Bhutan, India, Myanmar].