BRITTON AND ROSE 



PLATE XXII 



M. B. Eaton del. 



1. Joints of Opuntia microdasys. 



2. Flowering joint of Opuntia macrarthra. 



3. Fruit of Opuntia macrarthra. 



4. Seed of same. 



5. Flowering joint of Opuntia opitntiu. 

 (All natural size except 4.) 



