Flora of North America species comparison

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Vitis arizonica

Vitis subg. Vitis

canyon grape
Habit Plants sprawling to low climbing, shrubby, much 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;

lenticels inconspicuous or absent;

pith interrupted by nodal diaphragms;

tendrils branched or absent.
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.

Inflorescences

4–12 cm.

Flowers

functionally unisexual.

Berries

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

lenticels absent.

x

= 19.
2n

= 38.

Vitis arizonica

Vitis subg. Vitis
Phenology Flowering Apr–Jun; fruiting Jul–Oct.
Habitat Stream banks, canyon bottoms.
Elevation 400–3000 m. (1300–9800 ft.)
Distribution
from FNA
AZ; NM; NV; TX; UT; Mexico (Chihuahua, Coahuila, Nuevo León, Sinaloa, Sonora)
[WildflowerSearch map]
[BONAP county map]
North America; Mexico; Central America; South America; West Indies; Eurasia [Introduced nearly worldwide]
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.)

Species ca. 70 (18, including 3 hybrids, in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 13. FNA vol. 12, p. 8.
Parent taxa Vitaceae > Vitis > subg. Vitis Vitaceae > 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
Subordinate taxa
Synonyms V. arizonica var. galvinii, V. arizonica var. glabra, V. treleasei
Name authority Engelmann: Amer. Naturalist 2: 321. (1868) unknown
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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