Manchurian Maple

Trees, to 30 m tall, ?dioecious. Bark gray, smooth. Branchlets glabrous; winter buds small, scales glabrous. Leaves deciduous; petiole greenish yellow or purplish red, 7-10 cm; leaf blade papery, abaxially glabrous, with barbed hairs on midvein, adaxially green and glabrous, 3-foliolate; petiolule to 1 cm, slender; leaflet blades oblong, oblong-ovate, oblong-lanceolate, or lanceolate, 5-10 × 1.5-3 cm; middle leaflets cuneate apically, lateral leaflets suborbicular, margin obtusely serrate with very small teeth on upper parts of leaflets; lateral veins 9-11 pairs. Inflorescence corymbose, 3-5-flowered. Pedicel 2.5-3 cm. Sepals 5, ovate. Petals 5, obovate. Stamens 8; filaments glabrous. Disk glabrous, extrastaminal. Fruit yellowish brown; nutlets strongly convex, globose; wing including nutlet 3-3.5(-6) × ca. 1 cm, wings spreading acutely, obtusely, or nearly erectly. Fl. Jun, fr. Sep. 2n = 26.

SE Gansu, Heilongjiang, Jilin, Liaoning, S Shaanxi [Korea, E Russia].

Mixed forests; 500-2300 m.

Acer kansuense W. P. Fang & C. Y. Chang; A. mandshuricum subsp. kansuense (W. P. Fang & C. Y. Chang) W. P. Fang; Crula mandshurica (Maximowicz) Nieuwland; Negundo mandshuricum (Maximowicz) Budishchev ex Trautvetter.