Illustrations 
7 
apparently normal pollen grains marked with an arrow and found in the 
upper right-hand corner. Magnified 230 diameters. 
Fig. 11. A leafy shoot with a flower-cluster from the 1914 staminate 
Bourquiniana-Rotundifolia hybrid (Herbemont X Light Male No. 2). This is 
the oldest known Bourquiniana-Rotundifolia hybrid vine. Notice the five- 
lobed leaves which are characteristic of these hybrids; the short, simple and 
bifid tendrils, the small flower-cluster (similar to an average staminate Rotun- 
difolia flower-cluster) and the slender and nearly straight cane. Reduced. 
Fig. 12. Three typical leaves representing both parent and hybrid. Upper 
leaf is from Herbemont (female parent), lower left is from Rotundifolia 
(male parent), lower right is from the hybrid. The size of the leaf on this 
hybrid is determined by the Rotundifolia parent, but the lobing is much more 
pronounced than in the mature stage of the Herbemont parent, however, the 
juvenile leaves of Herbemont are deeply lobed. Reduced. 
Fig. 13. A flower-cluster of each of the parents and of the hybrid vine. 
The large flower-cluster at the right is from Herbemont (perfect hermaphro¬ 
ditic but used as the female parent), upper cluster at the left is from stami¬ 
nate Rotundifolia vine (male parent), low r er cluster is from the 1913 hybrid 
vine (staminate). The size of the flower-cluster on this hybrid is determined 
by the Rotundifolia species. Reduced. 
Fig. 14. A Vinifera-Rotundifolia hybrid vine (Malaga Seedling No. 1 
X G-52) showing the character of growth, shoots, leaves, tendrils, etc. of this 
vine. Not all hybrids of this lot resemble the vinifera parent as closely as 
does this vine. Reduced. 
Fig. 15. A leafy shoot with flower-clusters from a Vinifera-Rotundifolia 
hybrid vine, showing the comparative sizes of the flower-cluster, leaf and 
tendril; also a different type of lobing of the leaves from that of Fig. 14. 
Reduced. 
Fig. 16. Leaves from V. vinifera, V. rotundifolia, and from a hybrid vine. 
Upper, leaf is from Malaga Seedling No. 1 (female parent), lower right- 
hand leaf is from a Rotundifolia vine (male parent), lower left-hand leaf 
is from a hybrid vine. The size of the hybrid leaf is largely determined by 
the Rotundifolia species while the character and the lobing seem to be more 
or less intermediate between that of both the parents. Reduced. 
Fig. 17. A sample of leaves from the Vinifera-Rotundifolia hybrid vines, 
showing the differences that can be observed in the lobing of the leaves. Some 
are almost like Vinifera while others are almost like Rotundifolia leaves. 
Reduced. 
Fig. 18. Typical flower-clusters of V. vinifera, V. rotundifolia and of 
a hybrid vine. The cluster at the left is from Malaga Seedling No. 1, imper¬ 
fect hermaphroditic (female parent) ; the one at the right is from G-52, per¬ 
fect hermaphroditic (male parent) ; the one in the center is from a hybrid 
vine, perfect hermaphroditic. The small size of the flower-clusters of this 
and similar hybrid vines is determined largely by the Rotundifolia species. 
Reduced. 
Fig. 19. Two types of flower-clusters found among the Fj hybrid vines 
when Malaga Seedling No. 1 (imperfect hermaphroditic) is crossed with G-52 
(perfect hermaphroditic). The cluster on the left (perfect hermaphroditic) 
and the cluster on the^right (imperfect hermaphroditic) are typical in size 
of similar flower-clusters found among vines of the Rotundifolia species, 
otherwise the clusters are hybrid in character. Reduced. 
