15 



are strongly staminate. The former can be used as male parents 

 on the latter, which do produce a few viable seeds. Plants strongly- 

 male and seedless can be crossed with plants strongly male but 

 weakly female and near-seedless and, also, the self-fertilized progeny 

 of the latter may be obtained. In this way families weak in female- 

 ness may undoubtedly be obtained in which a considerable number 

 of individuals will produce seedless fruits. 



LITERATURE CITED 



Beach, S. A. 



1902 Potency of the pollen of self-sterile grapes. N. Y. 

 Agr. Exp. Sta. Bui. No. 228. 



Booth, N. O. 



1902 A study of grape pollen. N. Y. Agr. Exp. Sta. Bui. 

 No. 224. 



Detjen, L. R. 



1917 Inheritance of sex in Vitis rotundifolia. N. Car. Agr 

 Exp. Sta. Tech. Bui. No. 12. 



1919 Some Fi Hybrids of Vitis rotundifolia with related 

 species and genera. N. Car. Agr. Exp. Sta. Tech. 

 Bui. No. 18. 



Dorsey, M. J. 



1912 Variation in the floral structures of Vitis. Bui. Torrey 

 Bot. Club 39, 37~o 2. 



1914 Pollen development in the grapo with special reference 

 to sterility. Minn. Agr. Exp. Sta. Bid. No. 144. 



Engleman, G. 



1883 Bushberg Catalogue. 3rd Edition. 



Hedrick, U. P. and Anthony, R. D. 



1915 Inheritance of certain characters of grapes. Jour. 

 Agr. Research 4,315-330. 



Miiller-Thurgau, Herman. 



1898 Abhangigkeit der Ausbildung der Traubenbeeren und 

 einiger anderer Friichte von der Entwicklung der Samen. 

 Landto. Jahrb. der Schweiz 1898. Abs. in Bot. Centr 

 77, 135-138. 



