贡山枫 gong shan feng

Acer franchetii Pax var. acuminatilobum W. P. Fang & H. F. Chow; A. kungshanense var. acuminatilobum (W. P. Fang & H. F. Chow) W. P. Fang.

Trees to 20 m tall. Bark gray, vertically fissured. Branchlets terete, those of present year grayish brown, older ones grayish brown or dark grayish brown; winter buds gray, circular-conical, scales ciliate along margin. Leaves deciduous; petiole 9-12 cm, pubescent at tip; leaf blade abaxially greenish, adaxially dark green, 15-25 × 15-25 cm, subleathery, abaxially densely yellowish pubescent, adaxially pubescent, primary veins 3, secondary veins 21-24 pairs, distinct abaxially, base cordate, 3-lobed; lobes ovate, margin crenate, apex acute. Flowers unknown. Infructescence paniculate, 7-9(-12) cm, pubescent. Fruiting pedicel 1.5-3 cm, pubescent. Nutlets convex, yellowish pubescent; wing falcate, including nutlet 4-4.5 × 1.5-1.7 cm, wings spreading erectly or acutely. Fl. unknown, fr. Sep.

● Mixed forests, valleys; 2000-3200 m. NW and S Yunnan.