Flora of North America species comparison

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Vitis rotundifolia

Vitis mustangensis

muscadine, scuppernong

mustang grape
Habit Plants usually high climbing or sprawling, sometimes shrubby, usually sparsely branched. Plants high climbing, sparsely branched.
Branches

branchlets terete to slightly angled, usually sparsely grayish arachnoid, glabrescent, growing tips not enveloped by unfolding leaves;

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

nodes sometimes red-banded.

bark exfoliating in shreds;

nodal diaphragms 1.5–3 mm thick;

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 1–2 mm;

petiole mostly ± equaling blade;

blade cordate to nearly reniform, 2–12 cm, rarely lobed, apex short acuminate, abaxial surface not glaucous, glabrous, visible through hairs, veins and vein axils sometimes sparsely to densely hirtellous, adaxial surface glabrous.

stipules 1.5–4 mm;

petiole 1/2–3/4 blade;

blade cordate to nearly reniform, 6–14 cm, usually unlobed but sometimes 3-shouldered or 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

3–8(–10) cm.

4–10 cm.
Flowers

functionally unisexual.

functionally unisexual.
Berries

usually black or purplish, sometimes bronze when ripe, glaucous, globose, 8–25 mm diam., skin separating from pulp;

lenticels present.

usually black, sometimes dark red, slightly or not glaucous, globose, 12+ mm diam., skin separating from pulp;

lenticels absent.
2n

= 38.

Vitis rotundifolia

Vitis mustangensis
Phenology Flowering Apr–early Jun; fruiting Aug–Sep.
Habitat Woodland edges, fencerows, thickets, lowland woods, disturbed areas.
Elevation 0–700 m. (0–2300 ft.)
Distribution
from FNA
AL; AR; DE; FL; GA; KY; LA; MD; MO; MS; NC; OK; SC; TN; TX; VA; WV
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; LA; MS; OK; TX
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

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

In several early publications (for example, T. V. Munson 1909), Vitis mustangensis was known as V. candicans Engelmann ex A. Gray. M. O. Moore (1991) argued that the name V. candicans is ambiguous and not identifiable with any species based on the original description, making the more recent name V. mustangensis the valid and legitimate one for this species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Berries 15–25 mm diam., usually 2–8 per infructescence; seeds 9+ mm.
var. rotundifolia
1. Berries 8–12 mm diam., 12–30 per infructescence; seeds to 6 mm.
var. munsoniana
Source FNA vol. 12, p. 7. FNA vol. 12, p. 10.
Parent taxa Vitaceae > Vitis > subg. Muscadinia 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. 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. palmata, V. riparia, V. rotundifolia, V. rupestris, V. shuttleworthii, V. vinifera, V. vulpina, V. ×champinii, V. ×doaniana, V. ×novae-angliae
Subordinate taxa
V. rotundifolia var. munsoniana, V. rotundifolia var. rotundifolia
Synonyms Muscadinia rotundifolia V. candicans var. diversa, V. mustangensis var. diversa
Name authority Michaux: Fl. Bor.-Amer. 2: 231. (1803) Buckley: Proc. Acad. Nat. Sci. Philadelphia 13: 451. (1862)
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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