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* ECHINOCACTUS Ottonis. 



Mr. Otto's Spiny Cactus. 



ICOSANDRIA MONOGYNIA. 



Nat. ord. Cactace-e. 



ECHINOCACTUS. Bot. Reg. vol. 20.fol. 1707 



E. Ottonis; caule subrotundo, costis obtusiusculis distantibus, fasciculis spi- 

 narum distantibus subuliferis medio villosis, spinis 3-4 cseteris longioribus, 

 tubo calycis obconico tomentoso fusco petalis luteis acutissiniis aequali. 



Cact. p. 48. 



Mag. ^.3107. Pfeift 



A very pretty species of this curious genus ; according 

 to Sir W. Hooker a native of Brazil, but according to Pfeiffer 

 a Mexican plant. 



It is not at all uncommon in collections, where it regularly 

 flowers in July and August. 



The annexed figure was made in the garden of the Hor- 

 ticultural Society, 



See Bot. Reg. fol. 1707 



