13 



Wood: young, smootb, and terete, except in V. monticola thinly 

 pinkish-pubescent in striate lines along the obscure augles ; annual, 

 pale or reddish-brown ; diaphragm medium thick, bi-concave ; tendrils 

 intermittent, long, strong, mostly bifid 5 buds small, short, subtriaugu- 

 lar, brown. 



Leaves : stipules short, broad, thinly rusty-tomentose ; blade cordate, 

 entire or lobed, plane, smooth, and shining on both faces, except along 

 the pubescent ribs and veins; basal sinus fl-shaped in V. rubra and V. 

 monticola ; A-sbaped in V. cordifolia. 



Clusters : in V. cordifolia and V. rubra medium to large, loose, sel- 

 dom compound, with long peduncle ; in V. monticola short, compact, 

 shouldered, with medium to short peduncle. 



Berries : small, black, shining, without bloom, except in V. monticola 

 larger with bloom. 



Seeds: chalaza and raphe prominent in V. cordifolia and 7. monticola, 

 depressed in V. rubra. 



Germination, foliation, inflorescence, and ripening of fruit very late; 

 cutiings growing with difficulty ; little subject to diseases ; species all 

 very distinct and well characterized. 



'16. Vitis cjrdifolia, Michaux. Iowa to New York, South to Gulf. 

 17. Vitis rubra, Michaux. {V. palmata, Englm.) Illinois and 



6. Cordifoliw \ southward. 



I 18. Vitis monticola, Buckley. (V. T(xana, Mnnson.) Southwest 

 V Texas. 



Series 7. Cinerascentes, Planchon. 



Vine : slender, declining first year, becoming a strong grower and 

 climbing very high; young growing tips not enveloped in the quickly 

 unfolding but slowly enlarging leaves. 



Boots: one-year seedlings non-axial, enlarging downward, trans- 

 versely wrinkled, deeply penetrating, resistant. 



Wood : young, densely whitish or rusty pubescent, or woolly along the 

 angles ; buds small, subtriangular, acute, brown, in expanding dull 

 pink or rusty crimson ; tendrils intermittent, long, strong, mostly tri- 

 fid; mature annual, angled, densely ashy pubescent or rusty woolly; in 

 V. Virginiana, round, nearly smooth ; diaphragms thick, bi-concave. 



Leaves: stipules small ; blade long cordate, seldom lobed; basal sinus 

 mostly A-shaped in V. Blancoii narrowly fl-shaped, in V. Berlandieri 

 sometimes shaped, in (V. Caribwa often nearly truncate), plane; up- 

 per face rugose, dark, dull green; lower face densely pale, ashy pu- 

 bescent, rusty, or whitish woolly, the latter in the western Mexico form. 

 In V. Virginiana leaves fresh, lively green, with little pubescence along 

 ribs. In V. Berlandieri dark, glossy green above and below, with pu- 

 bescence along ribs. 



Cluster: large to verg large, loose or compact, compound ; peduncle 

 long ; pedicel slender. 



