Flora of North America species comparison

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Vitis riparia

Vitis shuttleworthii

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

Calloosa or leatherleaf or Florida grape, calloose grape
Habit Plants usually moderate to high climbing, sometimes sprawling, sparsely branched. Plants moderately 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 2.5–6 mm thick, sometimes continuing halfway into internode;

branchlets subterete to terete, densely to sparsely tomentose, growing tips not enveloped by unfolding leaves;

tendrils along length of branchlets, persistent, branched, tendrils (or inflorescences) at only 2 consecutive 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 less than 1 mm;

petiole 1/2–3/4 blade;

blade broadly cordate to nearly reniform, 4–12 cm, usually unlobed, sometimes 3-shouldered, infrequently deeply 3–5 lobed, apex acute to obtuse, abaxial surface not glaucous, densely white to rusty tomentose, concealed (except sometimes veins) by hairs, adaxial surface floccose to glabrate.
Inflorescences

(4–)9–12 cm.

4–10 cm.
Flowers

functionally unisexual.

functionally unisexual.
Berries

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

lenticels absent.

dark red to purple-black, slightly or not glaucous, globose, 12+ mm diam., skin separating from pulp;

lenticels absent.
2n

= 38.

= 38.

Vitis riparia

Vitis shuttleworthii
Phenology Flowering Apr–Jun; fruiting Aug–Sep. Flowering Apr–early May; fruiting Jun–Aug.
Habitat Stream and riverbanks, pond margins, alluvial woodlands, ravines, thickets, roadsides, fencerows. Well-drained pinelands, thickets.
Elevation 0–2200 m. (0–7200 ft.) 0–100 m. (0–300 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
FL
[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 shuttleworthii is endemic to peninsular Florida and apparently is the closest relative of V. mustangensis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 11. FNA vol. 12, p. 10.
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. vinifera, V. vulpina, V. ×champinii, V. ×doaniana, V. ×novae-angliae
Synonyms V. cordifolia var. riparia, V. riparia var. syrticola, V. vulpina subsp. riparia, V. vulpina var. syrticola V. coriacea, V. candicans var. coriacea
Name authority Michaux: Fl. Bor.-Amer. 2: 231. (1803) House: Amer. Midl. Naturalist 7: 129. (1921)
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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