FOURTH NATIONAL FLOWER SHOW 
171 
POLYANTHA ROSE 
ROSE BREEDING 
BY E. A. WHITE 
Professor of Floriculture, Cornell University 
In his excellent book on "Roses: Their History, Development, and Culti- 
vation," the Rev. Joseph H. Pemberton gives a clear and concise analysis of 
species. In commenting on this table, Mr. Pemberton remarks: ''If we ex- 
amine the table we shall notice two things: (i) the distance removed from the 
original species of the hybrid teas, and (2) that there are many species from 
which little, if any, advance has been made. . . . Does not this fact indi- 
cate the wide field still open to hybridists for the production of new roses?" 
Until within comparatively recent years, little was known regarding the 
laws governing heredity in plants, and much yet remains to be learned. In the 
past, the results which have been attained by hybridists have been largely 
