CONTENTS 
Page 
Introduction - 
Yitis rotundifolia - 
Yitis vinifera- 
Hybrids (Y. vinifera x Y. rotundifolia) - 
Vitis bourquiniana- 
Hybrids (V. bourquiniana x Y. rotundifolia) - 
Variety Wincliell (hybrid of V. labrusca x Y. aestivalis x Y. vinifera)- 
Hybrids (Var. Wincliell x V. rotundifolia) - 
Hybrids [ (Wincliell x Y. rotundifolia) x Y. rotundifolia]- 
Discussion - 
Summary - 
4 
6 
7 
10 
10 
11 
11 
13 
13 
15 
Fig. 
Fig. 
Fig. 
Fig. 
1. 
o 
3. 
ILLUSTRATIONS 
(Grouped at back of this Bulletin) 
Vitis rotundifolia, longitudinal section through the node. 
Yitis vinifera, longitudinal section through the node. 
Vitis rotundifolia, transverse section of internode. 
Yitis rotundifolia, transverse section of bundle, (p) pliellogen, (/) 
sclerencliyma fibers, ( h ) hard bast, ($) soft bast, (c) cambium, (r) 
ray, (v) vessel. 
Fig. 5. Vitis vinifera, transverse section of internode. 
Fig. 6. Vitis vinifera, transverse section of bundle, ( p ) pliellogen, (/) 
sclerencliyma fibers, (h) hard bast, (s) soft bast, (c) cambium, (r) 
ray, (v) vessel. 
Fig. 7. Hybrid (Y. vinifero x Y. rotundifolia), transverse section of bundle. 
Fig. 8. Hybrid (Y. vinifera x Y. rotundifolia)', transverse section of bundle. 
Fig. 9. Hybrid (Y. vinifera x V. rotundifolia), transverse section of bundle. 
Fig. 10. Hybrid (V. vinifera x V. rotundifolia), transverse section of bundle. 
Fig. 11-44. Careina lucida diagrams of transverse sections of bundles, Fig. 
11. V. vinifera, Fig. 12. V. rotundifolia, Figs. 13-3S. Hybrids Y. vinifera 
x Y. rotundifolia, Figs. 39-44. Hybrids bourquiniana x Y. rotundifolia, 
(/) sclerencliyma bundle, (p) pliellogen, (h) hard bast, (s) soft bast, 
(c) cambium, ( r ) ray, (v) vessel. 
Fig. 45. Y. bourquiniana, transverse section of bundles. 
Fig. 46. Variety Wincliell, transverse section of internode. 
Fig. 47. Variety Wincliell. transverse section of bundles. 
Fig. 48-75. Camera lucida diagrams of hybrids of Wincliell x Y. rotundi¬ 
folia. 
Fig. 76. Hybrid (var. Wincliell x Y. rotundifolia), transverse section of • 
bundles. 
Fig. 77. Hybrid (var. Wincliell x Y. rotundifolia), transverse section of 
bundles. 
Fig. 78. Hybrid (var. Wincliell x Y. rotundifolia), transverse section of 
internode. 
