82 SILVA OF NORTH AMERICA. ROSACE, 
Stark and Peoria counties, Illinois. It was first distinguished in May, 1895, by Mr. Virginius H. 
Chase. 
EXPLANATION OF THE PLATE. 
Piate DCLVIII. Cratmcus PRATENSIS. 
1. A flowering branch, natural size. 
- Vertical section of a flower, enlarged. 
. A calyx-lobe, enlarged. 
. A fruiting branch, natural size. 
. A fruit divided transversely, natural size. 
. A nutlet, front view, enlarged. 
Im OF RP W bb 
. A nutlet, rear view, enlarged. 
