those of E. Ottonis, of which Dr. Preirrer makes it a 
variety :—but, on the other hand, the form of the plant, 
a much depressed globe, is quite different from that of 
E. Ottonis, as may be seen by our tab. 3117, where that 
species is represented. The spines, too, are here much 
longer, and the native country of the two is very differ- 
ent ;—E. Ottonis being an inhabitant of Mexico, while E. 
tenuispinus is stated by Preirrer to come from South 
Brazil. 
It flowers in July, and makes a pretty appearance with 
the copious bright lemon-coloured flowers, large in propor- 
tion to the size of the plant, and the red stigmas in the 
centre. 
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