Flora of North America species comparison

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Vitis arizonica

Vitis mustangensis

canyon grape

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

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.

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 1.5–3 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.

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

4–12 cm.

4–10 cm.
Flowers

functionally unisexual.

functionally unisexual.
Berries

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

lenticels absent.

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

lenticels absent.
2n

= 38.

= 38.

Vitis arizonica

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

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.)

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.)
Source FNA vol. 12, p. 13. FNA vol. 12, p. 10.
Parent taxa Vitaceae > Vitis > subg. Vitis Vitaceae > Vitis > subg. Vitis
Sibling taxa
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
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
Synonyms V. arizonica var. galvinii, V. arizonica var. glabra, V. treleasei V. candicans var. diversa, V. mustangensis var. diversa
Name authority Engelmann: Amer. Naturalist 2: 321. (1868) 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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