三叶枫 san ye feng

Acer cissifolium K. Koch subsp. henryi (Pax) A. E. Murray; A. henryi f. intermedium W. P. Fang; A. henryi var. serratum Pampanini; Crula henryi (Pax) Nieuwland.

Trees to 10 m tall, dioecious. Branchlets slender; winter buds small, scales ovate, pubescent. Leaves deciduous; petiole 5-10 mm, pubescent; leaf blade elliptic or oblong-elliptic, 6-12 × 3-5 cm, papery, both surfaces pubescent especially on veins abaxially when young, then glabrescent with only tufts of hairs at vein axils abaxially, 3-foliolate, margin entire or remotely serrate apically, apex acuminate or cuneate. Inflorescence pendulous, racemose, to 7 cm, pubescent. Flowers subsessile or sessile, yellow-green. Sepals 4, ovate, ciliate along margin. Petals 4, white, deciduous before anthesis. Stamens 4, glabrous, rudimentary in pistillate flowers. Disk amphistaminal, small. Ovary glabrous, rudimentary in staminate flowers; style glabrous; stigmas revolute. Fruiting pedicel ca. 2 mm. Nutlets convex, oblong, ca. 1 cm; wing including nutlet ca. 2.5 cm × 5 mm, wings spreading at 90° or erectly. Fl. Apr, fr. Sep.

● Mixed forests; 500-1500 m. Anhui, Fujian, Gansu, Guizhou, Henan, Hubei, Hunan, Jiangsu, S Shaanxi, S Shanxi, Sichuan, Zhejiang.