BRITTON AND ROSE, VOL. Ill 
PLATE XVIII 
1 . Flowering plant of Gymnocalycium megalothelos. 
2 . Top of flowering plant of Gymnocalycium platense. 
3 . Flowering plant of Gymnocalycium mulliflorum. 
(All natural size.) 
M. E. Eaton del. 
A./foen Sc Co 
