122 THE GRAPES OF NEW YORK. 



Engelmann in his herbarium had given this variety the name prcBcox but 

 did not know whether it had been pubUshed or not. 



The variety differs from the typical form of Riparia only in the ripen- 

 ing season and possibly in the berries averaging smaller. The early ripening 

 season might make it of horticultural importance as a breeding stock 

 although in other respects the fruit characters are not such as would 



recommend it. 



6. VITIS TRELEASEI Munson.' 



I. Bailey, Gray's Syn FL, i:+2_;. 1897. 2. Munson, Tex. Sta. Bid., 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 verj' broad and open making 

 no distinct angle with the petiole, the margin imequally 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 ^ 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 1'. 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 bj* Munson but the only description we have been able to find is 



' Thomas Volney Munson, the well-known nurser%TTian, viticulturist. and plant-breeder, was 

 born near Astoria, Illinois, September 26, 1843. He graduated from Kentucky University, Lexing- 

 ton, Kentucky, in 1870. His nursery has for thirty-one years been located at Denison. Texas. 

 Munson has introduced more hybrid grapes than any other man in America and probably in the 

 ■world. He has paid great attention to grape botany, particularly to the southwestern species. 

 Monographs on grapes, from his hand, have appeared in the proceedings of various horticultural 

 societies and in horticultural journals. Bulletins written by him have been issued by the United 

 States Department of Agriculture and the Texas Experiment Station. He has at present a book 

 ready for publication entitled Foundatiotu of .\iiu-rican Grape Culture. The varieties produced by 

 Munson are particularly successful in the Southwest where conditions are such that most of our 

 northern varieties fail. The most valuable of those that have been thoroughly tested are Brilliant, 

 America, Carman, Gold Coin and Rommel. 



