Vitis

Lianas, climbing by tendrils, sprawling, or occasionally shrubby, functionally dioecious (synoecious in V. vinifera). Branches: bark exfoliating (adherent in V. rotundifolia); pith brown, interrupted by nodal diaphragms (continuous through nodes in V. rotundifolia); tendrils 2–3-branched (unbranched in V. rotundifolia), rarely absent, without adhesive discs. Leaves simple. Inflorescences functionally unisexual (bisexual in V. vinifera), leaf-opposed, thyrses. Flowers functionally unisexual (bisexual in V. vinifera); calyx a minute rim, entire or 5-toothed; petals (3–)5(–9), connate distally, forming calyptra; nectary free, (3–)5(–9) glands alternating with stamens; stamens usually (3–)5(–9), sometimes 0 in pistillate flowers; style conic, short. Berries purple or black. Seeds 1–4 per fruit. x = 10.

Vitis

Vitis

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