Tetrastigma formosanum (Hemsl.) Gagnep.

Lianas, woody, slender. Branchlets terete, with longitudinal ridges, glabrous; tendrils unbranched. Leaves 3-foliolate; petiole 1-2 cm; petiolules 2-3 cm, glabrous; leaflets elliptic, 4-6(-8) × 2-3 cm, glabrous, lateral veins of central leaflet 7-9 pairs, veinlets conspicuously raised abaxially, inconspicuous adaxially, base truncate, margin with 5 or 6 fine teeth on each side, apex obtuse; lateral leaflets ovate-elliptic, 4-6 × 2.4-2.8 cm, lateral veins 5-7 pairs, base cuneate or subrounded, margin with 3-7 fine teeth. Inflorescence umbelliform, axillary, 1.5-2 cm, with nodes and oval bracts; peduncle 4-5 cm, glabrous. Pedicel 1-3 mm, glabrous. Buds elliptic, 2-3 mm, apex rounded. Calyx saucer-shaped, glabrous; teeth triangular, apex acute. Petals triangular-elliptic, apex with scarce papillose hairs. Filaments filiform; anthers elliptic. Disk conspicuous, 4-lobed. Berry obovoid-elliptic, 6-8 × 5-6 mm, 1-seeded. Seed obovoid-elliptic, base rostrate, apex subrounded. Fl. Mar-Apr.

● Shrublands. Taiwan.

Vitis formosana Hemsley, Ann. Bot. 9: 151. 1895.