Flora of North America species comparison

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Vitis riparia

Vitis ×novae-angliae

frost grape, river grape, river-bank grape, vigne de rivages

New England grape, pilgrim grape
Habit Plants usually moderate to high climbing, sometimes sprawling, sparsely branched. Plants high climbing, sparsely branched.
Branches

bark exfoliating in shreds;

nodal diaphragms to 0.5 mm thick;

branchlets terete, glabrous or sparsely hirtellous, growing tips enveloped by unfolding leaves, glabrous or sparsely hairy;

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

nodes not red-banded.

bark exfoliating in shreds;

nodal diaphragms 0.3–1.1 mm thick;

branchlets terete, sparsely arachnoid or glabrous, growing tips not enveloped by unfolding leaves;

tendrils along length of branchlets, persistent, branched, tendrils (or inflorescences) at 3+ consecutive nodes, usually not at all nodes;

nodes not red-banded.
Leaves

stipules 3–5 mm;

petiole 1/2 to ± equaling blade;

blade cordate, 6–20 cm, 3-shouldered to shallowly 3-lobed, apex short acuminate, abaxial surface not glaucous, glabrate, visible through hairs, veins and vein axils hirtellous, adaxial surface glabrous.

stipules 2.5–6 mm;

petiole 1/2 to ± equaling blade;

blade cordate, 10–20 cm, usually 3-shouldered, apex acute to short acuminate, abaxial surface not glaucous, ± densely arachnoid when young, sparsely arachnoid when mature, visible through hairs, adaxial surface usually glabrous.
Inflorescences

(4–)9–12 cm.

7–13 cm.
Flowers

functionally unisexual.

functionally unisexual.
Berries

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

lenticels absent.

black, slightly glaucous, globose, 12+ mm diam., skin separating from pulp;

lenticels absent.
2n

= 38.

Vitis riparia

Vitis ×novae-angliae
Phenology Flowering Apr–Jun; fruiting Aug–Sep. Flowering Jun; fruiting Aug–Sep.
Habitat Stream and riverbanks, pond margins, alluvial woodlands, ravines, thickets, roadsides, fencerows. Thickets, roadsides, pond and stream margins, fence- and hedgerows.
Elevation 0–2200 m. (0–7200 ft.) 70–1400 m. (200–4600 ft.)
Distribution
from FNA
AL; AR; CO; CT; DC; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NY; OH; OK; OR; PA; RI; SD; TN; TX; VA; VT; WA; WI; WV; WY; MB; NB; NS; ON; QC; SK
[WildflowerSearch map]
[BONAP county map]
from FNA
CT; MA; ME; NH; NJ; NY; PA; RI; VT; ON
[BONAP county map]
Discussion

Vitis riparia is native throughout much of its range. It has become naturalized in a few locations in Saskatchewan, Oregon, and Washington. Plants on dunes around the Great Lakes with hairier petioles and leaf blades sometimes have been recognized as var. syrticola; variation in hairiness is essentially continuous, however, and the form is not worthy of taxonomic recognition (P. M. Catling and G. Mitrow 2005).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Vitis ×novae-angliae is a presumed hybrid between V. labrusca and V. riparia and is common in the New England region (M. O. Moore 1991).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 11. FNA vol. 12, p. 9.
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. rotundifolia, V. rupestris, V. shuttleworthii, V. vinifera, V. vulpina, V. ×champinii, V. ×doaniana, V. ×novae-angliae
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. vinifera, V. vulpina, V. ×champinii, V. ×doaniana
Synonyms V. cordifolia var. riparia, V. riparia var. syrticola, V. vulpina subsp. riparia, V. vulpina var. syrticola
Name authority Michaux: Fl. Bor.-Amer. 2: 231. (1803) Fernald: Rhodora 19: 146. (1917) — as species
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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