Description

Key Characters:

Growth Form: Vines, herbaceous.

Stems: Branchlets terete (cylindrical), with longitudinal ridges, usually glaucous, glabrous, tendrils bifurcate.

Roots:

Leaves: Leaves simple. Alternate. Blades cordate-oval, 5-13 × 4-9 cm. Apex acute or acuminate. Base cordate. Surfaces glabrous. Margins with 9-12 sharp teeth on each side. Basal veins 3-5, lateral veins 3 or 4 pairs, veinlets inconspicuous. Petioles 2.5-7 cm, glabrous. Stipules brownish, oblong, 5-6 × 2-3 mm, membranous, glabrous.

Flowers: Inflorescence umbelliform, terminal or leaf-opposed; peduncle 1-3 cm, glabrous. Flowers perfect. Pedicel 2-4 mm, nearly glabrous. Buds oval, ca. 4 mm, apex obtuse. Calyx entire or undulate. Petals triangular-ovate, ca. 3 mm, glabrous. Anthers ovoid-elliptic. Ovary superior, lower part adnate to disk; style conical; stigma slightly expanded.

Fruit: Berries 0.8-1.2 cm × 4-8 mm; 1-seeded. Seeds surface smooth; with sparse ribs.

Ploidy: 2n = 22; 24.

Habitat:

Elevation Range: