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Key to Vitaceae
https://fsus.ncbg.unc.edu/main.php?pg=show-key.php&keyid=39876
1 Leaves simple, sometimes shallowly or deeply 3-5 (-7)-lobed. | |
2 Tendrils not twining, terminating in adhesive disks; [tribe Parthenocisseae] | |
2 Tendrils twining, lacking adhesive disks. | |
3 Petals connate at their tips, falling together; pith tan to brown, interrupted by a diaphragm at each node (subg. Vitis) or continuous through the node (subg. Muscadinia); bark adherent (subg. Muscadinia) or exfoliating (subg. Vitis); tendrils bifid or trifid (subg. Vitis) or simple (subg. Muscadinia); [tribe Viteae]. | |
4 Petals 4; stamens 4; upper leaf surfaces puberulent with upright, whitish-gray hairs; [tribe Cisseae] | |
8 Inflorescences leaf-opposed or apparently terminal; leaves 3-7-foliolate; [tribe Parthenocisseae]. | |
8 Inflorescences axillary or leaf-opposed; leaves 3-foliolate (even the largest and best-developed). | |