k 



178 



THE CACTACEAE. 



the changes we see in certain other genera such as Cephalocereus, Arrojadoa, and to a less 

 extent in Carnegiea, on account of which both this species and Carnegiea gigantea have 

 been referred by some authors to the genus Pilocereus. 



Lophocereus schoUii inhabits parts of western Mexico and southern Arizona, which 

 have great aridity, but it usually grows in colonies and in this way seems to withstand the 

 rigor of the desert. Its range is more extensive than that of most cacti and it shows con- 

 siderable variabiUty. Three species of Lophocereus have been described, but appear to be 

 merely geographical races of this one. 



Illustrations: MacDougal, Bot. N. Amer. Des. pi. 8; Cact. Mex. Bound, pi. 74, f. 16, 

 as Cereus schottii; Schumann, Gesamtb. Kakteen f. 37,. 38, as Pilocereus schottii; Orcutt, 

 Gard. and For. 4: f. 69, as C. sargentianus; Monatsschr. Kakteenk. 5: 86, as P. sargentianus. 



4^- > 



. 4> 





^^;:>^+^i^^'^= »^^^-^^=^--^^^ ^^ 





n- ^ 





■ ^ '',-,' . ^' ^^' " -' ^ ' - \' ^ <" , * ;a, ^*^ ^j*-^ s^.^ -- -^ -■ > 



■_ t -f -i-^ ^ 





r*-^- 



\ 



'1 















- ,-. -'^''^ 



:.r-'^'-^. i 





^' 



v» 



:. * 



■J 



Fig. 251. — Ivophocereus schottii 



-\ ' 



from a photograph obtained by Edward Palmer near Guaymas, Sonora 



.V 



Lower California, in 191 1; figu 



stem 



^S 



\ 



from Arizona to the New York Botanical Garden 



M YRTILLO CACTUS 



^J 61. MYKllLLOCACTUS Console, Boll. R. Ort. Bot. Palermo i: 8. 1897- 



Large cacti, usually with short trunks and large, much branched tops, the stout, few-ribbed 

 ches nearly erect, a thp nrnr»i«c k«^^: — *i ° ' , • , _r • r, ^ ,- 1 , c«ia 1. 



bearing 



scvciai, bomeumes as many as 9 at an areole, with 

 segments ; ovary bearing a few minute scales with 

 globular, edible ; seed very small, black, with basj 



small, 









+ - 



'A 



f , 





