三叶地锦 san ye di jin

Vitis semicordata Wallich in Roxburgh, Fl. Ind. 2: 481. 1824; Ampelopsis himalayana Royle; Parthenocissus cuspidifera (Miquel) Planchon var. pubifolia C. L. Li; P. himalayana (Royle) Planchon; P. himalayana var. rubrifolia (H. Léveillé & Vaniot) Gagnepain; P. himalayana var. vestita Handel-Mazzetti; P. semicordata var. rubrifolia (H. Léveillé & Vaniot) C. L. Li ["rubifolia"]; Psedera himalayana (Royle) C. K. Schneider; V. himalayana (Royle) Brandis; V. himalayana var. semicordata (Wallich) M. A. Lawson; V. rubrifolia H. Léveillé & Vaniot; V. semicordata var. himalayana (Royle) Kurz ex Hance.

Branchlets terete, sparsely pilose when young, becoming nearly glabrescent; tendrils with 4-6 branches, young apex of tendril curving and slender. Leaves 3-foliolate; petiole 3.5-15 cm, sparsely pubescent; leaflets usually nearly sessile, abaxially pubescent on veins, lateral veins 4-7 pairs, veinlets inconspicuous or slightly raised; central leaflet obovate-elliptic or obovate, 5-13 × 3-6.5 cm, base cuneate, margin 6-11-toothed, apex cuspidate; lateral leaflets ovate-elliptic or oblong, 5-10 × 3-5 cm, base asymmetric, nearly rounded, margin toward outside 7-15-toothed, margin toward inside 4-6-toothed, apex mucronate. Polychasium with inconspicuous main axis; peduncles 1.5-3.5 cm, glabrous or slightly pilose. Pedicel 2-3 mm, glabrous. Buds elliptic, 2-3 mm, apex rounded. Calyx entire. Petals ovate-elliptic, 1.8-2 × ca. 8 mm, glabrous. Filaments 0.6-0.9 mm; anthers ovoid-elliptic, 0.4-0.6 mm. Disk inconspicuous. Ovary nearly spherical; style short; stigma not expanded. Berry 6-8 mm in diam., 1- or 2-seeded. Seeds obovoid, base rostrate, apex rounded. Fl. May-Jul, fr. Aug-Oct.

Forests or shrublands on hillsides; 500-3800 m. Gansu, Guangdong, Guizhou, Hubei, Hunan, Shaanxi, Sichuan, Xizang, Yunnan [Bhutan, India, Indonesia, Malaysia, Myanmar, Nepal, Thailand, Vietnam].