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

40. Acer crassum Hu & W. C. Cheng, Bull. Fan Mem. Inst. Biol., n.s. 1: 201. 1948.

厚叶枫 hou ye feng

Trees to 12 m tall, andromonoecious. Bark blackish brown, rough. Branchlets glabrous, those of present year purplish green, older ones blackish gray or grayish brown; winter buds ovoid, scales yellowish brown, ciliate along margin. Leaves persistent; petiole 1-2 cm, rough; leaf blade abaxially gray-green, adaxially dark green and shiny, elliptic or elliptic-oblong, (6-)8-14 × (2.2-)3.5-6 cm, thickly leathery, abaxially mealy, veins 8-10 pairs, base cuneate or broadly cuneate, margin entire, apex acute or obtuse, acumen 6-12 mm. Inflorescence terminal, corymbose, 5-6 cm, villous; peduncles 1-2 cm. Pedicel slender, yellowish pilose. Sepals 5, greenish, obovate-oblong, 3-3.2 mm. Petals 5, yellowish, lanceolate or oblanceolate, 3.3-4 mm. Stamens 8. Disk glabrous, extrastaminal. Ovary purple, densely yellow pilose. Fruit yellow-purple, ± villous; nutlets convex, ca. 1 cm; wing including nutlet 2.8-3.2 cm, wings spreading at 90°. Fl. Apr, fr. Sep.

● Mixed forests; ca. 1000 m. SE Yunnan.


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