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mustang grape

canyon grape

Habit Plants high climbing, sparsely branched. Plants sprawling to low climbing, shrubby, much branched.
Branches

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.

bark exfoliating in plates;

nodal diaphragms 1.5–3 mm thick;

branchlets slightly angled when young, becoming terete, arachnoid or arachnoid-floccose, sometimes glabrescent, growing tips not enveloped by unfolding leaves;

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 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.

stipules 1.5–3 mm;

petiole 1/2 to ± equaling blade;

blade cordate to cordate-ovate, 5–12 cm, usually unlobed to 3-shouldered, sometimes shallowly 3-lobed, apex acute to acuminate, abaxial surface not glaucous, moderately to sparsely arachnoid, visible through hairs, veins and vein axils sometimes only hirtellous, adaxial surface sparsely arachnoid or glabrous.

Inflorescences

4–10 cm.

4–12 cm.

Flowers

functionally unisexual.

functionally unisexual.

Berries

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

lenticels absent.

black, slightly or not glaucous, globose, 6–10 mm diam., skin separating from pulp;

lenticels absent.

2n

= 38.

= 38.

Vitis mustangensis

Vitis arizonica

Phenology Flowering Apr–early Jun; fruiting Aug–Sep. Flowering Apr–Jun; fruiting Jul–Oct.
Habitat Woodland edges, fencerows, thickets, lowland woods, disturbed areas. Stream banks, canyon bottoms.
Elevation 0–700 m. (0–2300 ft.) 400–3000 m. (1300–9800 ft.)
Distribution
from FNA
AL; LA; MS; OK; TX
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM; NV; TX; UT; Mexico (Chihuahua, Coahuila, Nuevo León, Sinaloa, Sonora)
[WildflowerSearch map]
[BONAP county map]
Discussion

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.)

Vitis arizonica is variable and intergrades with V. girdiana in southern Nevada; it is in need of in-depth field and experimental studies. Some authors have recognized two varieties of this species (vars. arizonica and glabra), but the characters used to distinguish them intergrade so freely that their recognition does not seem justified.

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

Source FNA vol. 12, p. 10. FNA vol. 12, p. 13.
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. palmata, V. riparia, V. rotundifolia, V. rupestris, V. shuttleworthii, V. vinifera, V. vulpina, V. ×champinii, V. ×doaniana, V. ×novae-angliae
V. acerifolia, V. aestivalis, 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. candicans var. diversa, V. mustangensis var. diversa V. arizonica var. galvinii, V. arizonica var. glabra, V. treleasei
Name authority Buckley: Proc. Acad. Nat. Sci. Philadelphia 13: 451. (1862) Engelmann: Amer. Naturalist 2: 321. (1868)
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