BRITTON AND ROSE 



PLATE XXII! 



^ ^ "' 



M- E. Eaton del 



t 



/" 



*: 



1 



I 

 ^ - _ _ 



Flowering joint of Optintia fuscoatra 



2. Upper part of joint of Opuniia sulphurea. 



* Hocn % t.^. 



L . 



*- \ 



3. 



Joint of Opuntiatenuispina. {^^ natural size.) 



_ \ 





