12 



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

 versely wrinkled generally; resistant to phylloxera, in V. vinifera non- 

 resistant. 



Wood: young, tomentose or quite smooth in V.bicolor, sometimes 

 bearing spinous pubescence near the joints, cylindrical ; tendrils inter- 

 mittent, mostly bifid; mature annual, pale or reddish-brown; dia- 

 phragms medium thick in V. bicolor, to very thick in V. Simpsonii, bi- 

 concave ; buds dormant, medium to very large, subtriangular ; opening 

 buds rosy, crimson, or violet. 



Leaves: stipules short, broad, rusty tomentose; blade medium to 

 very large, broadly cordate, entire or lobed ; basal sinus A-suaped; 

 upper face slightly rugose, of a dark lively green; generally plane; 

 lower face rusty-flocculent tomentose in V. aestivalis to ashy, felt-like 

 tomentose in V. Lincecumii and V. Simpsonii, to bluish glaucous in V. 

 bicolor, aud V. Lincecumii, var. glauca. 



Clusters : medium to large, mostly simple, with large shoulder ; pedi- 

 cels large, peduncle long. 



Berries : small to large, with moderate prunose bloom, mostly astrin- 

 gent, sometimes very sweet and vinous ; persistent in V. vinifera and V. 

 Bourqu'miana, much less in V. bicolor, V. aestivalis, and generally shed- 

 ding easily when ripe in V. Lincecumii ; often having white dots in native 

 species of this series, 



Seeds: chalaza, raphe, and beak generally prominent ; long proportion- 

 ally to breadth. 



Germination, foliation, inflorescence, and ripening of fruit, medium to 

 very late; cuttings usually growing with greatest difficulty, bnt in V. vini- 

 fera quite easily, and in V. Bourquiniana fairly well. Natively found 

 in moderately high, warm, loamy, ivell-drained sandy soils. 



f (a.) Vitis vinifera, Linnaeus ) . 



(b.) Vitis Bourquiniana, Munson J 



12. Vitis Lincecumii, Buckley. South Texas, var. glauca, Mun- 

 son. North Texas to South Missouri. 



5. JEstivales { VS. Vitis bicolor, Leconte. Kentucky to Michigan, Wisconsin, 



Illinois, New York, and Southward. 

 14. Vitis aestivalis, Michaux. Tennessee, Georgia, Virginia, aud 

 southward. 

 V 15. Vitis Simpsonii. Munson. Florida. 



Series 6. Cordifoliae, Munsou. 



Vine : seedlings first year feeble, declining ; mature, slender or me- 

 dium stocky, climbing very high ; young tips naked, much extended 

 beyond the full-sized leaves ; bark freely shedding in thin brittle plates 

 after first year. 



Boots : one-year seedlings enlarging downward a foot or more, ex- 

 cept in V.monticola axial and tapering; transversely wrinkled; very 

 resistaut to phylloxera. 



