CEPIIALOCKRIvUS. 



31 



6. Cephalocereus macrocephalus Weber in Schumann, Gesamtb. Kaktecn 197. 1897. 



Pilocereus macrocephalus Weber, Diet. Hort. Bois 966. 1898. 

 Cereus macrocephalus Berger, Rep. Mo. Bot. Gard. 16: 62. 1905. 



Plant of great size, 10 to 16 meters high, with a very sohd woody trunk 3 to 6 dm. in dianittcr, 

 simple or with a few ascending branches; pseudocephalium not so conspicuous as in Cephalocereus 

 senilis; ribs numerous (about 24), low, obtuse, pale green; radial spines about 12, spreading; central 

 spines several, sometimes 6 cm. long; flowering areoles spineless but bearing white, stiff hairs or 

 weak bristles; perianth about 5 cm. long, the tube bearing a few distant scales, the limb short, the 

 outer segments rounded. 



Type locality: Tehuacan, Mexico. 



Distribution: Southern Puebla, Mexico 



common 



forest of considerable size. The 



Cct 



some 



Illustrations: 



S. Nat. Herb. 10: pi. 43, f. B; MacDougal 



Des. d1. is;: Nat. Geoerr. M 



H^ 



from a photosrraph taken by Dr. MacDougal near Tehu 



7. Cephalocereus pentaedrophorus (Labouret). 



Cereus pentaedrophorus Labouret, Moiiogr. Cact. 365. 



Pilocereus polyedrophoriis Lemaire, Rev. Hort. 1862: 428. 



Pilocereus pentaedrophorus Console in Schumann, Gesamtb. Kaktccn 174. 



1853. 

 1862. 



1897. 



m 



Stems very slender, usually only 2 to 5 meters, rarely 7 or occasionally 10 meters high, 10 cm. 

 diameter or less, bluish, glaucous especially toward the growing tip; ribs usually 4 to 6, but 



occasionally as many as 8; areoles without wool, 



often large, separated by horizontal grooves or de- 

 pressions; spines yellow, various as to size and num- 

 ber, usually 6 to 12, the longest often 4 cm. long; 

 flow^crs 4 to 6 cm. long; perianth-tube bent near the 

 middle; ovary and tube green, glabrous, rarely with 

 a few minute scales; perianth-segments small, white; 

 fruit depressed-globose, 3 cm. broad; pulp red, juicy. 



Type locality: Moro-Queimado, Bahia, 



Brazil. 



Distribution: Very common in the brush 



country of Bahia, Brazil, but not found in dry 



parts of that state. 



Labouret (Monogr. Cact. 365. 1853) gives 

 Ccrciis pentalophorus h^houTct and Cereus penta- 

 gonus glaticus Morel as synonyms. 



^^ 



Fig. 31. — Cephalocereus pentaedrophorus 





I'Vuil of Ccphal<x:ercus fxrntacdrophorns 

 Flower of same. X0.6. 



It 



o 6, 



This species 

 tube being more 



r 



from its relatives in its smalle 

 curved or sometimes abruptly 



fruits, in the flovver- 

 the flowering areoles 



;-V' 



* 



- t 





Ji. 



f ' 





i^- 



< v 



Ji4 ^ 1 



4 

 1 1 



J I 



