48 



THE CACTACKAH. 



ihrysacanthus (Weber) 



_ irysacanlhus Weber in Sch 



Cereus chrysacanthus Orcutt, West Amer. Sci. 13: 63. 



909 



1897. 



1902. 



Plant 3 to 5 meters high, branching near the base ; branches erect or ascending, glaucous ; ribs 

 about 12; areoles about i cm. apart; spines. 12 to 15, the longer ones 3 to 4 cm. long, at first golden 

 yellow, becoming darker in age; flowers borne in definite zones on one side of the ^•— ^ -— - 

 panied by dense masses of long white hairs, nocturnal, 7 to 8 cm. long, rose-red; fruit 

 or purplish, about 3 cm. in diameter, the flesh red; seeds black. 



r" 



b 



Type locality: Near Tehuacan; Mexict)'. 



smooth 



Distribution: 



Mexico 



M oilers 



MacDougal, Bot. N. Amer 



from a photograph taken by Dr. MacDougal 



Esp 



Mexico, in 1906. 



31. Cephalocereus maxonii Rose, Contr. U. S. Nat. Herb. 12: 417. 1909. 



Cereus maxonii Vaupel, Monatsschr. Kaktcenk. 23: 23. 1913. 



Plant 2 to 3 meters high, with few long branches, erect or nearly so, in mature plants the tops 

 of the branches for about 30 cm. clothed with white hairs 4 to 5 cm. long; ribs 6 to 8, acute, pale 

 blue and somewhat glaucous; areoles small; spines about 10, slender, yellow, the central single, 4 

 cm. long, all nearly hidden in flowering areoles by the long white hairs; flowers purple, 4 cm. long; 

 ovary naked except for a few small scales; fruit 3.5 cm. broad, broader than high; seeds brownish, 

 reticulate, with an oblique basal hilum. 





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X7 









I'iG. 71. — Cephalocereus maxonii, 



r>'/7t' locality: Near El Rancho, Guatemala 

 Distribution: Guatemala. 



Fig. 72. — Cephalcxrereus piauhyensis. 



smce and is now to be found in living collections. 



collected 



Guatemala 



1, 





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