Acer cinnamomifolium Hayata; A. cinnamomifolium var. microphyllum W. P. Fang & S. Y. Liang; A. coriaceifolium var. microcarpum W. P. Fang & S. S. Chang; A. oblongum Wallich ex Candolle var. macrocarpum Hu.

Trees to 15 m tall. Bark blackish gray or blackish brown; lenticels ovate or oblong-ovate; winter buds brown, scales ovate, tomentose along margin. Leaves persistent; petiole 1.5-3 cm, slender, tomentose; leaf blade abaxially pale green, adaxially dark green, ovate-oblong or rarely lanceolate, 8-12 × 2.5-5 cm, leathery, abaxially tomentose, less so when mature, adaxially glabrous, lateral veins 5 or 6 pairs, base broadly cuneate, cuneate, or rarely obtuse, margin entire, apex apiculate. Inflorescence terminal, corymbose. Pedicel ca. 1 cm, slender, tomentose. Flowers 5-merous. Sepals 5, light green, oblong, ca. 4 mm. Petals 5, light yellow, obovate, ca. as long as sepals. Stamens 8, longer than petals. Disk extrastaminal, white pubescent. Ovary white pubescent. Infructescence corymbose, tomentose. Fruit brownish yellow, tomentose when young, slightly so when mature; nutlets strongly convex, ca. 7 × 6 mm; wing including nutlet 2.8-3.5 cm × ca. 7 mm, wings spreading obtusely or acutely. Fl. Mar, fr. Aug.

● Forests; 1500-2500 m. S Anhui, Fujian, Guangdong, N Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, SE Sichuan, Zhejiang.