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1. Bailey, Gray’s Syn. Fl., 1:423. 1897. 2. Munson, Tex. Sta. Bul., 56:230, 239. 1900. Smooth Canyon Grape.

Plant shrubby and much branched, climbing little, the small and mostly short (generally shorter than the leaves) tendrils deciduous the first year unless finding support, internodes short, the diaphragms twice thicker (about 1-16 inch) than in V. riparia and shallow-biconcave; stipules less than one quarter as large as in V. riparia; leaves large and green, very broad-ovate or even reniform-ovate (often wider than long, thin, glabrous and shining on both surfaces, the basal sinus very broad and open making no distinct angle with the petiole, the margin unequally notch-toothed (not jagged as in V. riparia) and indistinctly three-lobed, the apex much shorter than in V. riparia; * * * cluster small (2 to 3 inches long); the berries 1/3 inch or less thick, black with a thin bloom, ripening three weeks later than V. riparia when grown in the same place, thin-skinned; pulp juicy and sweet; seeds small. * * * Little known, and possibly a dry country form of V. riparia. In habit it suggests V. arizonica var. glabra, from which it is distinguished, among other things, by its decidedly earlier flowering and larger leaves with coarser teeth and less pointed apex.

According to Munson Vitis treleasei inhabits “ravines and gulches of western New Mexico, Arizona and southern Utah.” This species was named by Munson but the only description we have been able to find is that of Bailey given above in which we have changed his “vulpina” to “riparia.” The species is of no importance horticulturally.