﻿8 SEEDS AND PLANTS IMPORTED. 



S. P. I. Xo. 4*2691 is the new Chinese Deutzia longifolia veitchii, 

 one of the most interesting new flowering shrubs introduced from 

 China, with large beautiful rose-colored flowers, making it especially 

 suitable for parks. 



Eose growers will take a particular interest in the remarkable col- 

 lection of rose species (Nos. 42974 to 42982) from the Arnold Arbo- 

 retum, which has gathered them from China and Chosen (Korea). 

 This collection represents material of the greatest value for hybrid- 

 izers and can hardly fail to lead to the origination of man}^ new and 

 lovely hardy roses for America. 



Perhaps the most remarkable plant listed, from the botanist's 

 point of view, is the Javanese shrub Pavetta zimmermanniana (Xo. 

 42T6T). Its leaves are inhabited by bacterial colonies which induce 

 knots analagous to those formed by Bacillus radicicola in the roots 

 of leguminous plants. These knots are apparently essential to the 

 healthy growth of the plant, and the bacterium is universally pres- 

 ent in the young seed. This represents a new class of plants whose 

 role in our agriculture remains to be further studied. 



The botanical determinations of seeds introduced have been made 

 and the nomenclature determined by Mr. H. C. Skeels, while the de- 

 scriptive and botanical notes have been arranged by Mr. G. P. Van 

 Eseltine, who has had general supervision of this inventory. The 

 manuscript has been prepared by Mrs. Ethel H. Kelley. 



David Fairchild, 

 Agricultural Explorer in Charge. 



Office of Foreign Seed and Plant Introduction, 



Washington, D. C, February 11, 1919. 



