CKI'IIALOCKKKI'S. 



51 



Cereus barbatus Wendland (Salm-Dyck, Cact. Hort. Dyck. 1844. 29. 1845) was given 

 as a synonym of Cereus floccosus. Cereus royenii armatus Salm-Dyck (Walpcrs, Report. 

 Bot. 2: 276. 1843), and ( '. royenii floccosus Monville (Labourer., Monogr. Caet. 343. 1853) 

 are given only as synonyms. 



Cephalocereus fouachianus Ouehl (Monatssehr. Kakteenk. 20:39. 1910), name only, 

 belongs here. 



Cereus gloriosus (Pfeiffer, Enum. Cact. 80. 1837) was printed as a synonym. 



Illustrations: Monatssehr. Kakteenk. 12:56, as Pilocereus royenii; J burn. N. Y. Bot. 

 Gard. 7: f. 4, this last as Pilocereus sp. 



Figure 74 is from a photograph taken by Frank E. Lutz on Desecheo Island, in 1914; 

 figure 69 represents a flower of the plant from Culebra Island, collected by Dr. Britton. 



teiM 



! 'T-\ %^W 



k Mwmm 



fc FlG. 75. — Cephalocereus rohustus. 



Fig. 76. — Cephalocereus comeles. 



