Description from Flora of China
Trees to ca. 7 m. Branchlets ridged, 4-angled when young, brown tomentose; buds naked. Leaves 9-16 cm; petiole 2-3 cm; axis brown tomentose; leaflets (11-)15-25, subsessile; leaflet blade elliptic to oblong, (1.5-)2.5-4.5 x 1-2 cm, thin leathery, adaxially glabrescent, abaxially yellowish tomentose along veins, base cuneate to broadly cuneate, rarely rounded, oblique, margin entire, apex acute or retuse; primary veins 6-8 on each side of midrib. Panicles terminal or lateral, 5-9 cm, many flowered; bracts subspatulate, 5-7 mm. Flowers bisexual, appearing after leaves. Pedicel ca. 2 mm. Calyx cuplular, ca. 1 mm, apically truncate or with broadly deltate teeth. Corolla white; lobes linear, ca. 3 mm. Samara narrowly spatulate, 2-2.5 cm x 4-5 mm; wing decurrent to about middle of nutlet. Fl. Jun, fr. Sep-Nov.
* Dry rocky slopes; ca. 2000 m. Yunnan