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Vitis vulpina  L.
Morris County, Kansas
Height: Vines to 80 feet long
Family: Vitaceae - Grape Family
Flowering Period:   May, June, July
Also Called: Chicken grape.
Trunks: Stems climbing; branches unarmed, tips not enveloped by unfolding leaves, tendrils persistent, branched; bark grayish brown, furrowed or sometimes exfoliating in thin strips; wood light brown, soft.
Twigs: Greenish brown to reddish brown, flexible, glabrous; leaf scars half-round to crescent-shaped; pith brown; buds ovoid, .16 to .2 inch, apex acute, scales tomentose.
Leaves: Deciduous, alternate, simple; petiole 1.6 to 2.8 inches, glabrous; blade cordate to ovate, 4 to 6 inches long, 3.2 to 4 inches wide, base ovate to cordate, margins more or less regularly dentate with teeth usually convex on both sides, usually unlobed, sometimes shallowly 3-lobed, apex acuminate, lower surfaces light green, hirtellous along veins and in axils, not glaucous, upper surfaces green, glabrous.
Flowers: Inflorescences opposite leaves on new growth, thyrses, 50-200-flowered, lax, 4 to 5.6 inches; peduncle .4 to 2.4 inches, glabrous or sparsely pubescent; pedicels .2 to .24 inch, glabrous. Flowers dioecious; unisexual, radially symmetric; sepals 5, connate, lobes green, reduced to an obscure rim; petals 5, connate distally, white, oblong to elliptic, ca. .08 inch; staminate: stamens 5, to .08 inch; pistillate: pistil 1, ovary superior, 2-locular; style 1; stigma 1, lobed.
Fruit: August-October; berries, dark purple to black, globose, .24 to .4 inch diam., smooth, slightly glaucous or not, glabrous, flesh not milky; seeds 14, grayish brown, broadly ovoid, .18 to .24 inch long, .14 to .16 inch wide, smooth.
Habitat: Floodplain forests, mesic upland forests, stream banks, thickets, bases of bluffs.
Distribution: East 1/2 of Kansas
Origin: Native
Comments: Vitis vulpina is most often confused with V. riparia; the former typically has more uniform teeth with convex sides and thicker nodal diaphragms.

Winter grape leaves
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Morris County, Kansas
Winter grape inflorescence
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Eastern Kansas (photo by Craig Freeman)
Winter grape fruit
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Morris County, Kansas
Winter grape fruit
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Morris County, Kansas
Winter grape bud
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Morris County, Kansas
Winter grape bark
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Morris County, Kansas
Winter grape fruit
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Morris County, Kansas