Flora of North America species comparison

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Vitis vinifera

Vitis acerifolia

cultivated grape, European grape, grape of commerce, wine grape

bush or panhandle or mapleleaf grape, mapleleaf grape
Habit Plants sprawling to moderately high climbing, sparsely branched. Plants low to moderately high climbing, much branched.
Branches

bark exfoliating in shreds or plates;

nodal diaphragms 3–5 mm thick;

branchlets terete to slightly angled, pubescent, sometimes glabrescent, growing tips not enveloped by unfolding leaves;

tendrils along length of branchlets, persistent, tendrils (or inflorescences) at only 2 consecutive nodes;

nodes not red-banded.

bark tardily exfoliating in plates;

nodal diaphragms to 0.5(–1) mm thick;

branchlets terete, whitish arachnoid or glabrate, growing tips enveloped by unfolding leaves, sparsely to densely hairy;

tendrils along length of branchlets, soon deciduous if not attached to support, branched, tendrils (or inflorescences) at only 2 consecutive nodes;

nodes not red-banded.
Leaves

stipules usually more than 3.5 mm;

petiole ± equaling blade;

blade cordate-ovate to cordate-orbiculate, 12–20 cm, usually 3-shouldered to 3–5-lobed, sometimes deeply so, apex acute to short acuminate, abaxial surface not glaucous, sparsely pubescent to glabrate, visible through hairs, adaxial surface usually glabrous.

stipules 3–6 mm;

petiole 1/2–2/3 blade;

blade broadly cordate, 7–12 cm, usually 3-shouldered to shallowly 3-lobed, apex usually short acuminate, abaxial surface not glaucous, sparsely arachnoid to glabrate, visible through hairs, veins sparsely hirtellous, adaxial surface slightly arachnoid to glabrate.
Inflorescences

10–20 cm.

3–7(–9) cm.
Flowers

bisexual.

functionally unisexual.
Berries

usually reddish purple to nearly black, sometimes yellow-green, ± glaucous, oblong to ellipsoid, 8–25 mm diam., skin adhering to pulp;

lenticels absent.

black, heavily glaucous, globose, 8–12 mm diam., skin separating from pulp;

lenticels absent.
2n

= 38, 76.

= 38.

Vitis vinifera

Vitis acerifolia
Phenology Flowering Apr–Jun; fruiting Jul–Sep. Flowering Apr–May; fruiting Jul–Aug.
Habitat Riparian areas, disturbed sites. Stream and riverbanks, prairie ravines, alluvial floodplain woodlands, dunes, rocky slopes, fencerows.
Elevation 0–1200 m. (0–3900 ft.) 200–2300 m. (700–7500 ft.)
Distribution
from FNA
CA; ID; MA; NH; NY; OR; PA; WA; BC; Europe [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; KS; NM; OK; TX
[BONAP county map]
Discussion

Vitis vinifera and cultivars formed by hybridization between it and native North American species or through selection are cultivated in Europe, many parts of the United States and southern Canada, and parts of Central and South America, Africa, Asia, and Australia; these have been reported persisting from cultivation (for example, in California, Utah, and Virginia) and occasionally escaping. Some specimens keying here may represent naturally occurring hybrids between native species and V. vinifera or its hybrid cultivars.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 8. FNA vol. 12, p. 11.
Parent taxa Vitaceae > Vitis > subg. Vitis Vitaceae > Vitis > subg. Vitis
Sibling taxa
V. acerifolia, V. aestivalis, V. arizonica, V. californica, V. cinerea, V. girdiana, V. labrusca, V. monticola, V. mustangensis, V. palmata, V. riparia, V. rotundifolia, V. rupestris, V. shuttleworthii, V. vulpina, V. ×champinii, V. ×doaniana, V. ×novae-angliae
V. aestivalis, V. arizonica, V. californica, V. cinerea, V. girdiana, V. labrusca, V. monticola, V. mustangensis, V. palmata, V. riparia, V. rotundifolia, V. rupestris, V. shuttleworthii, V. vinifera, V. vulpina, V. ×champinii, V. ×doaniana, V. ×novae-angliae
Synonyms V. cordifolia var. solonis, V. longii, V. longii var. microsperma, V. nuevomexicana, V. solonis, V. solonis var. microsperma
Name authority Linnaeus: Sp. Pl. 1: 202. (1753) Rafinesque: Med. Fl. 2: 130, plate 99, fig. C. (1830)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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