BRITTON AND ROSE 



PLATE XVi 





dPfc^ 



M. E. Eaton del. 



* **0»*.# CO 



1. Tov oi Opuntia miquelii. 2. Old aud youi 



3. Upper part of joint of Opuntia ignescens 



joints of Opuntia i 

 (All natural size.) 



