BRITTON AND ROSE, VOL. Ill 



PLATE XIX 



M. E. Eaton del. 



1. Top of flowering plant of Gymnocalycium platense. 



2. Top of flowering plant of Gymnocalycium schickendantzii. 



3. Top of flowering plant of Homalocephala texensis. 



4. Fruit of same. 



5. Seed of same. 



(All natural size, except seed.) 



