VITIS 



VITIS 



1951 



Macoun. to N. Dak., Kans. ami Colo, and south to W. Va., 

 Mo. and N.W.Texas. B.M 2129. -The commonest Grape 

 in the northern states west of New England, abundant 

 along streams. Variable in the flavor and maturity of 

 the fruit. Forms with petioles and under surfaces of 

 lvs. pubescent sometimes occur. Occasionally 

 hybridizes with V. Labrusca eastward, the hy- 

 brid being known by the tomentose young 

 shoots and unfolding leaves, and the darker foli- 

 age, which is marked with rusty tomentum along 

 the veins of the less jagged leaves. 



Var. precox, Bailey, is the June Grape of 

 Missouri, the little sweet fruits ripening in July. 



10. Treleasei, Munson. Plant shrubby and 

 much branched, climbing little, the small and 

 mostly short (generally 

 shorter than the lvs.) ten- 

 drils deciduous the first year 

 unless finding support, in- 

 ternodes short, the dia- 

 phragms twice thicker 

 (about one -sixteenth in.) 

 than in V. vulpina and shal- 

 low-biconcave: stipules less 

 than one-fourth as large as 

 in V. vulpina: lvs. 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 

 and making no distinct an- 

 gle with the petiole, the 

 margin unequally notch - 

 toothed (not jagged as in V. 

 vulpina) and indistinctly 3- 

 lobed, the apex much shorter 

 than in V. vulpina: fertile 

 fls. with very short, recurved 

 stamens, sterile with as- 

 cending stamens: cluster 

 small (2 to 3 in. long) : ber- 

 ries ^3 in. or less thick, black 

 with a thin bloom, ripening 

 three weeks later than V. 

 vulpina when grown in the 

 same place, thin-skinn 

 pulp juicy and 

 sweet: seeds 

 small. Brewster 

 county, S. W. 

 Texas and New 

 Mexico to Brad- 

 sbaw Mountains. 

 Arizona. - Little 

 known, and pos- 

 sibly a dry-coun- 

 try form of V. 

 vulpina. In habit it sug- 

 gests V. Arizonica, var. gla- 

 bra, from which it is dis- 

 tinguished, among other 

 things, by its earlier flower- 

 ing and larger leaves with 

 coarser teeth and less 

 pointed apex. 



11. Longii, Prince ( V. 

 Soldnis, Planch. V. Nuevo- 

 Mezicana, Lemm.). Differs 

 from vigorous forms of V, 

 vulpina in having floccose 

 or pubescent young growth : 

 lvs. decidedly more circular 

 in outline, with more angu- 

 lar teeth and duller in color, 

 often distinctly pubescent 

 beneath: stamens in fertile 

 fls. short and weak and 

 laterally reflexed, those in sterile fls. long and strong: 

 seeds larger. N.W.Texas and New Mexico. — Regarded by 

 French authors as a hybrid, the species V. rupestris, 



123 



vulpina, candicans and cordifolia having been sug- 

 gested as its probable parents. It is variable in char- 

 acter. In most of its forms it would be taken for a com- 

 pound of V, rupestris and V. vulpina, but the latter 

 species is not known to occur in most of its range. It 



J698. Vitis vulpina (or V. riparia). Natl 

 Probably the most widespread of American nati- 



was very likely originally a hybrid between V. rupestris 

 ( which it sometimes closely resembles in herbarium 

 specimens except for its woolliness) and some tomentose 



