20 Vine (Vitacece). [No. 5 



GUIDE TO SPECIES. 



(a) Bark shreddy, tendrils forked. 



(b) A tendril or flower-cluster opposite each leaf on the 

 new wood, (i) Northern Fox-Grape (V. labrusca, L.) 

 (<$) Tendrils and flower-clusters intermittent (wanting 

 opposite each second or third leaf on the new wood). 

 (V) Leaves sometimes rusty-downy beneath, especially 

 when young, sometimes with a bluish bloom. 

 Branchlets cylindrical. (2) Summer Grape (V. 

 aestivalis, Mx.). 

 (c) Leaves mostly with whitish persistent down. 

 Branchlets angled. West and South. (3) Downy 

 Grape (V. cinerea, Eng.). 

 (c) Leaves usually not downy (smooth or short hairy 

 beneath). 

 (d) Fruit very small (about one quarter inch in 

 diameter), without bloom. Clusters, mostly 

 loose. (4) Frost-Grape (V. cordifolia). 

 (d) Fruit, one third to five twelfths inch in diameter, 

 with a thick bloom. Clusters mostly compact. 

 Western New England to Pennsylvania and 

 westward. (5) River-Grape (V. riparia, Mx.). 

 (d) Fruit, one third to five twelfths inch or more 

 in diameter, shining, without bloom. Clusters 

 mostly loose. West and South. (6) Red 

 Grape (V. palmata, Vahl.). 

 (a) Bark not shreddy, tendrils not forked. (7) Southern 

 Fox-Grape (V. rotundifolia, Mx.). 



Fig. 8.— (1) Northern Fox-Grape. V. labriisca, L. 



Flowers, the pistillate forms in compact clusters. June. 



Leaves, variable, from four to six inches wide, very rusty- 

 woolly (or sometimes whitish-woolly), when young, 

 and continuing so beneath when grown. Tendrils, 

 once or twice forked ; a tendril or flower-cluster 

 opposite each leaf. Bark, loose and in shreds. 

 Young branchlets, woolly. 



