28 



the: cactaceae. 



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So far as we know, the type has not been preserved. The species is sometimes culti- 

 vated, but it has never done well with us under glass. Mr. Berger was able to grow it at 



La Mortola, Italy. 



There has long been considerable confusion regarding the characters of this species, 

 partly because other cacti have been confused with it. For instance, the only specimens 

 (several flowers) in the Engelmann Herbarium, so named, although from the region of this 

 species, are those of a Pachycereus. 



Illustrations: Knippel, Kakteen pi. 29; Grassner, Haupt-Verz. Kakteen 29. 191 2; 

 Mollers Deutsche Gart. Zeit. 29: 355. f. 10; Schelle, Handb. Kakteenk. f. 38, as Piloce- 

 reus hoppenstedtii; Bull. Soc. Acclim. France 52: f. 15, as Pilocereus lateralis. 



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Fig. 24.— Cephalocereus senilis. 



purpureus Giirke, Monatssch 



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Fig. 25. — Cephalocereus purpureus. 



1908. 



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narro^wlreiisX^^^^^^ to 15, broad, low, separated by 



large, longer than broad. wWteC^lly ^d spTnt S^ """' ^'^"^ '^" '°P °^ ^^^^ ^^^^1^' ^^^^^^^ 

 long or Jess; central spines 8 to 10. thelS on^s . c^ To ''k^ ^^ '^' ^"^"^^^' ^^^e, short, i cm 

 side of the plant, confined to only a few of the Hhs r^ f^t^ 2^' """^"^^ pseudocephalium on the west 

 ing, 4 to 5 cm. long; tube and outer pSh se^enl^ 'T^^P'^ ^^ ^^^ht, clos^ 

 stamens and stvlf Jnoi„.i«^. f«.:* " ,, P*^"anin-segments pmkish: mner nprianfli-c«,t>,^„*. ...u.-f^. 



f. w!!'\P'"^''? ' ^^^^'^ perianth-segments 



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J ype locality : Serra do Sincora Bahia T^ravJi q ^ 



Distribution: Southern centralBaS^'BS' '•'°° """'''' 



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