15 
REPOR TIO Sav RI Pit O ROCEE SBR ANI Oe ae ENE, 
ARNOLD ARBORETUM 
Dr. C. Stuart GAGceER, Director. 
Sir:—I take pleasure in presenting the following report of 
my trip to Rochester and to the Arnold Arboretum, on October 
21-25, to arrange for the purchase and exchange of specimens of 
woody plants. ‘Two days were spent at Rochester and three days 
at the Arnold Arboretum. 
From the latter institution the Garden secured 514 species 
of shrubs, trees and vines, all purchased, represented by one or 
sometimes two or three specimens of each kind. More than 375 
of the species secured were collected by Mr. E. H. Wilson during 
four trips to western China, and it is these Chinese plants that 
add so much to the botanical value of the collection. The rest of 
the 514 species are, in part, rare and otherwise interesting plants, 
many of them also from China, and collected by Mr. W. Purdon, 
the remainder being of general botanical and horticultural interest. 
The Garden is very fortunate in being able to secure these plants 
at this time, as in many ways the collection is unique. The 
arboretum, at great expense and a large outlay of Mr. Wilson’s 
time, has secured perhaps the rarest collection of Chinese woody 
plants in existence. Through the cooperation of Prof. C. S. 
Sargent, the director of the Arnold Arboretum, the Garden had 
the opportunity of choosing the material mentioned above. I 
spent three days with Mr. Wilson in going over their nurseries 
and selecting the species of which they were willing to spare a 
plant or two. 
There are more than 127 genera of woody plants in the col- 
lection secured at the arboretum, and many of these are extremely 
rare in cultivation. Among the most interesting botanically are 
the Japanese Lacquer Tree (Rhus vernicifera), the original home 
of which is China, Paliurus orientalis, of the Buckthorn family, 
Paliothyrsis sinensis, of the Flacourtia family, and many more. 
The well known affinity of the flora of eastern Asia with that 
of eastern North America is particularly well illustrated in this 
collection. Many native shrubs and trees find their prototypes 
in the mountains of China, and the Wilson collection is rich in 
