74 



THE CACTACEAE:. 



character is not constant; flower differences are described, but these are inconstant. One 



Ihijlora, has already been referred to synonymy 



come from 



times 



from 



from 



on the border of Paraguay; indeed, O. alhiflora, one of the three, was described from a 

 Paraguay collection ; the other, 0. spegazzinii, is a native of the deserts of northern Argentina. 



Cactus salmianus Lemaire (Cact. 87. 

 synonym; as has also O. florihiinda Lemaire 



name 



1839)- 



Weber, included bv Schumann 



to our series Aurantiacae. 



Fig. 88. — Opuntia salmiana. 



Opuntia wagneri Weber in Gosselin (Bull. Mus. Hist. Nat 



Fig. 89. — O. salmiana. Xo.6- 



believed it to be of this group. We hav 

 Argentina, obtained by M. Emile Wagner 



referred 



1904), de- 



specimens from Chaco, 



Jard. Fleur. 2: pi. 194; I^oudon, Encycl 



Mag 



Op 



Hogg, Veg. King 



Kakteen 



III. 



Figure 88 is from a plant in the greenhouses of the United States Department 

 ire at Washington; figure 89 represents a joint of a plant collected by Dr. 

 loba, Argentina, in 1 9 1 5 . 



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