Vitis mustangensis |
Vitis aestivalis |
|
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mustang grape |
summer grape, summer or post oak or big summer or silverleaf or blue grape, vigne d'été |
|
Habit | Plants high climbing, sparsely branched. | Plants high climbing, sparsely 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 shreds; nodal diaphragms 1–4 mm thick; branchlets terete, tomentose, arachnoid-floccose, or glabrous, growing tips not enveloped by unfolding leaves; tendrils along length of branchlets, persistent, 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 1–4 mm; petiole ± equaling blade; blade cordate to orbiculate, 7–25 cm, unlobed to 3-shouldered or 3–5-lobed, sometimes deeply so, apex acute to short acuminate, abaxial surface glaucous, ± arachnoid or floccose, visible through hairs, hairs usually rusty, sometimes whitish, veins and vein axils sometimes hirtellous, adaxial surface glabrous or puberulent. |
Inflorescences | 4–10 cm. |
7–20 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, glaucous, globose, 8–20 mm diam., skin separating from pulp; lenticels absent. |
2n | = 38. |
= 38. |
Vitis mustangensis |
Vitis aestivalis |
|
Phenology | Flowering Apr–early Jun; fruiting Aug–Sep. | Flowering Apr–Jun; fruiting Jul–Sep. |
Habitat | Woodland edges, fencerows, thickets, lowland woods, disturbed areas. | Woodlands, woodland borders, thickets, fence- and hedgerows, scrub, stabilized dunes, stream or riverbanks, floodplain and upland forests, lowland woods. |
Elevation | 0–700 m. (0–2300 ft.) | 0–2000 m. (0–6600 ft.) |
Distribution |
AL; LA; MS; OK; TX
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AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; NE; NH; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; ON
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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 aestivalis is sometimes confused with V. cinerea. However, the glaucous abaxial leaf surfaces, more heavily glaucous and larger berries, terete branchlets that are less evenly pubescent, preference for better drained, drier habitats, and earlier blooming period distinguish V. aestivalis from V. cinerea. Several varieties have been recognized based on leaf and young stem pubescence and fruit sizes (B. L. Comeaux et al. 1987; M. O. Moore 1991). The boundaries of the varieties are highly inconsistent and it is often difficult to apply the varietal concepts in the field. Recent molecular evidence supports the monophyly of V. aestivalis, but none of the varieties were supported as monophyletic (Wan Y. et al. 2013). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 10. | FNA vol. 12, p. 8. |
Parent taxa | Vitaceae > Vitis > subg. Vitis | Vitaceae > Vitis > subg. Vitis |
Sibling taxa | ||
Synonyms | V. candicans var. diversa, V. mustangensis var. diversa | V. aestivalis var. argentifolia, V. aestivalis var. bicolor, V. aestivalis var. linsecomii, V. aestivalis var. sinuata, V. aestivalis subsp. smalliana, V. aestivalis var. smalliana, V. araneosa, V. gigas, V. labrusca var. aestivalis, V. linsecomii, V. linsecomii var. glauca, V. rufotomentosa, V. sinuata, V. smalliana, V. vinifera var. aestivalis |
Name authority | Buckley: Proc. Acad. Nat. Sci. Philadelphia 13: 451. (1862) | Michaux: Fl. Bor.-Amer. 2: 230. (1803) |
Web links |