Vasilis Teodoridis:
Aceraceae | Acer
80. Acer caudatum Wallich; Pl. Asiat. Rar. 2: 4. 1831.
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Acer caudatum var. erosum (Pax) Rehder; A. caudatum subsp. georgei (Diels) A. E. Murray; A. caudatum var. georgei Diels; A. caudatum var. multiserratum (Maximowicz) Rehder; A. caudatum subsp. prattii (Rehder) A. E. Murray; A. caudatum var. prattii Rehder; A. erosum Pax; A. multiserratum Maximowicz; A. papilio King.
Trees to 10 m tall; andromonoecious. Branchlets stout; with elliptic or oblong lenticels; winter buds ovoid; outer scales ovate. Leaves deciduous; petiole red; 5-9 cm; glabrous or pubescent; leaf blade abaxially light green; adaxially dark green; 8-12 cm wide; membranous; abaxially yellowish pilose; adaxially glabrous except pubescent on veins; base cordate or deeply cordate; 5-lobed; rarely 7-lobed; lobes ovate or triangular-ovate; margin doubly and sharply incised-serrate; with acuminate teeth; apex caudate or acuminate. Inflorescence terminal; red; compact; racemose-paniculate; villous; peduncles 8-10(-12) cm. Pedicel 5(-8) mm; slender; slightly pubescent. Sepals 5; ovate-lanceolate; ca. 3 mm. Petals 5; linear-oblong; ca. 7 mm; glabrous. Stamens 8; glabrous. Disk extrastaminal; lobed; glabrous. Ovary densely yellow tomentose; style 1-5 mm; stigmas spreading. Fruit yellowish brown; nutlets ovoid-subglobose; rarely flat; veined; wing including nutlet 2.5-2.8 cm x 7-9 mm; wings spreading acutely or erectly. Fl. May; fr. Sep. 2n = 26.
Alpine forests; 1700-4000 m. SE Gansu; W Henan; W Hubei; Ningxia; S Shaanxi; W Sichuan; SE Xizang; NW Yunnan [Bhutan; N India; Myanmar; Nepal].