PL 350 
SOME OF MR. ROCK'S INTRODUCTIONS FROM YUNNAN. 
The plants collected by Agricultural Explorer J. F. Rock in the remote Province of Yunnan, 
southwestern China, are being propagated in the United States and distributed to experi- 
menters for trial. Mr. Rock has sent in large quantities of seeds, including many interesting 
species of Pyrus, Malus, and other genera well known in the Temperate Zone. The above 
illustration shows several rows in the nursery at the Plant Introduction Garden, Bell, Md., 
where these plants have been grown during the past summer; on the left is an undetermined 
species of Sorbaria, in the right center (two rows) a species of Photinia, and on the extreme 
right a Pyracantha. (Photographed by Wilson Popenoe, August 27, 1923; P35030FS.) 
