SOME F, HYBRIDS BETWEEN VITIS ROTUNDIFOLIA 
AND RELATED SPECIES* 
L. R. Detjen, Assistant Horticulturist 
INTRODUCTION 
In the search for information regarding the limits of hybridization of 
Vitis rotundifolia, numerous hybrid plants of different parentage have 
been produced. Up to the present time only nine different combina¬ 
tions of parents are represented, hut from even this small number much 
valuable information has been obtained as to the nature of the charac¬ 
ters found in the F x hybrid vines. 
Since the hybrid character of the seedling is proof positive that 
hybridization has been effected between two given individuals, we pub¬ 
lish herewith careful descriptions of some of these hybrid vines that the 
evidence may he conclusive. Furthermore, an analysis of these hybrids 
has led us to make comparisons of these with certain well-known and 
so-called “false hybrids’ 7 and other vines that are claimed to he hybrids 
between Muscadinia and Euvitis, and to point out wherein these are not 
hybrids as represented, but only pure seedlings of the Muscadine group. 
The following list of combinations of species and varieties includes 
representatives of all the hybrid vines that we have so far produced and 
are herein described, but only seedling vines from the first three 
parental combinations are old enough to permit of a thorough and 
minute description. 
A. LIST OF PARENTAL COMBINATIONS EFFECTED 
I. Winchell (Vinifera-Labrusca-Aestivalis) X Rotundifolia 1912 
and 1916. 
II. Herbemont (Bourquiniana) X Rotundifola 1913, 1916 and 
1917. 
III. Malaga Seedling No. 1 (Vinifera) X Rotundifolia 1916. 
IV. Malaga Seedling No. 3 (Vinifera) X Rotundifolia 1917. 
V. Malaga (Vinifera) X Rotundifolia 1917. 
VI. Oberlin Vine (Rotundifolia) X Malaga (Vinifera) 1917. 
VII. Vitis cordifolia (native species) X Rotundifolia 1917. 
VIII. Concord (Labrusca) X Rotundifolia 1917. 
IX. Winchell-Rotundifolia hybrid X Rotundifolia 1917. 
* Original manuscript submitted January, 1919. 
