MACLOSKIE: REVISION OF FLORA PATAGONICA. 181 



Fam. 74. CACTACE^E. Macl., p. 591. 



CEREUS Haw. 



P- 592 : 



C. DUSENI Web. 



Occurs in N. Patag., Territory of Neuquen. 



C. PATAGONICUS Web. (non patagonica). 



E. Patagonia, Puerto Madryn, Golfo de San Jorge, Sta. Cruz; probably 

 rare in the interior ; found in the central part of the Sta. Cruz Territory, 

 at Rio Leona and at Laguna Tar in the upper valley of Arroyo Scheuen. 



ECHINOPSIS Zucc. 

 P. 593, line 2, insert: 



E. MELANOPOTAMICA Speg. 



N. Patagonia, Rio Negro, Rio Neuquen. 



ECHINOCACTUS Lk. et Otto. 



P. 593 : 



E. ACUATUS Lk. et Otto var. TETRACANTHUS Lehm. 



This name should replace E. acuatus Lk. et Otto, the variety, but not 

 the species, being known from Patagonia. 



E. GIBBOSUS CHUBUTENSIS Speg. 



Is identical with E. melanopotamica Speg., occurring in Neuquen, and 

 by Rio Sta. Cruz. 



OPUNTIA Haw. 



P- 595, add after line 7, the following species : 



(6) O. AUSTRALIS Web. 

 S. and Mid-Patagonia, Rio Sta. Cruz, Rio Chubut. 



(7) O. DUSENII Web. 

 Patagonia, Chubut Territory. 



