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FOC | Family List | FOC Vol. 11 | Aceraceae | Acer

35. Acer tonkinense Lecomte, Fl. Indo-Chine. 1: 1054. 1912.

粗柄枫 cu bing feng

Acer kwangsiense W. P. Fang & M. Y. Fang; A. liquidambarifolium Hu & W. C. Cheng; A. tonkinense subsp. kwangsiense (W. P. Fang & M. Y. Fang) W. P. Fang; A. tonkinense subsp. liquidambarifolium (Hu & W. C. Cheng) W. P. Fang.

Trees to 12 m tall, andromonoecious. Bark dark brown, smooth. Branchlets white waxy, glabrous, those of present year purplish green, older ones purple-brown or dark purple. Leaves deciduous; petiole purplish green, glabrous, 2-3.5 cm; leaf blade elliptic, suborbicular, or oblong, (8-)10-17 × 7-15 cm, subleathery, abaxially glabrous except for axillary tufts of hairs, adaxially glabrous, primary veins 3, lateral veins 7-10 pairs, base nearly rounded or subcordate, deeply or shallowly 3-lobed or 3-dentate, sinuses to 1/3 width of blade; lobes triangular, margin entire, apex acute. Inflorescence terminal, paniculate, 8-10 cm, many flowered. Sepals 5, purplish green, triangular. Petals 5, yellowish. Stamens 8. Disk extrastaminal, pubescent. Ovary densely pubigerous. Fruit yellowish; nutlets convex, nearly rounded, ca. 8 × 6 mm; wing falcate, including nutlet 1.8-3.5 cm, wings spreading ± horizontally. Fl. Apr-May, fr. Sep.

Mixed forests; 300-1800 m. Guangxi, S Guizhou, SE Xizang, SE Yunnan [Myanmar, Thailand, N Vietnam].


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