毛叶枫(原亚种) mao ye feng (yuan ya zhong)

Acer muliense W. P. Fang & W. K. Hu; A. muliense var. pentaneurum W. P. Fang & W. K. Hu; A. stachyophyllum var. pentaneurum (W. P. Fang & W. K. Hu) W. P. Fang; A. tetramerum Pax var. dolichurum W. P. Fang & Y. T. Wu; A. tetramerum var. elobulatum Rehder; A. tetramerum f. longeracemosum Rehder; A. tetramerum f. mapienense W. P. Fang; A. tetramerum var. tiliifolium Rehder; A. tetramerum f. viridicarpum W. P. Fang.

Petiole 3-8 cm, slightly pubescent near apex; leaf blade ovate, 8-11 × 5-6 cm, papery, abaxially densely pale pubescent, becoming less so when mature, adaxially glabrous, lateral veins 4 or 5 pairs, base rounded or rarely slightly cordate, margin coarsely serrate with appressed obtuse or ± acute teeth, undivided, apex caudate-acuminate, cuspidate. Fruiting pedicel 2-2.5 cm, slender, glabrous. Nutlets oblong, convex, strongly rugose; wing including nutlet 4-5 × 1.5(-2) cm, wings spreading erectly, rarely obtusely or acutely. Fl. Apr-May, fr. Oct. 2n = 26.

Alpine forests; 2000-3500 m. W Hubei, Sichuan, S and SE Xizang, NW Yunnan [Bhutan, N India, Myanmar, Nepal].