BRITTON AND ROSE 



PLATE XXXII 





. E. Eaton del 



1 . Upper part of flowering joint of Opun/ia leptocarpa. 3. Flowering joint of Ofwntia rrliitina. 



2. Fruit of the same. 4. Upper part of joint of Opun/ia mt.iracan.lha. 



(All natural size.) 



