BRITTON AND ROSE, VOL. Ill 
PLATE XXIII 
5 
1 . Flowering plant of Hickenia microsperma. 
2 . Flowering plant of Malacocarpus ottonis. 
3 . Fruit of Sclerocactus polyancisti'us. 
4 . Seed of same. 
5 . Flowering plant of Echmofossulocactus violaciflorus. 
(All natural size, except seed.) 
.4 I/oen & Co 
