50 



THE CACTACEAE. 



35. 



Cephalocereus royenii (Linnaeus) Britton and Rose, Contr. U. S. Nat. Herb. 12 



419 



1909 



1768. 

 1812. 



Cactus royenii Linnaeus, Sp. Pi. 467- i753- 

 Cereus royenii Miller, Gard. Diet. ed. 8. No. 7. 

 Cereiis ftdvispinosus Haworth, Syn. PI. Succ. 183. 

 Cactus fulvispinosus Sprengel, Syst. 2 : 496. 1825. 

 Cereus floccosus Otto in Pfeiffer, Enum. Cact. 81. i»37- 

 Cereus armatus Otto in Pfeiffer, Enum. Cact. 81. 1837- 

 Pilocereus floccosus Lemaire, lUustr. Hort. 13: under pi. 470. 1866. 

 Cereus leiocarpus Bello, Anal. Soc. Esp. Hist. Nat. 10: 276 i»8i 

 Pilocereus barbatus Rebut in Forster, Handb. Cact. ed. 2. 650. i885- 

 Pilocereus royenii Riimpler in Forster. Handb. Cact. ed. 2 682. i8»5. 

 Pilocereus royeni armatus Salm-Dyck in Forster, Handb Cact. ed. 2. 682. 

 Pilocereus strictus fouachianus Schumann, Gesamtb. Kakteen 190. 1897. 

 ' Pilocereus fulvispinosus Schumann, Gesamtb. Kakteen 196. 1897. . 

 Pilocereus fouachianus Weber in Gossdin, Bull. Mus. Hist. Nat. Pans 10. 

 Cereus fouachianus Vaupel, Monatsschr. Kakteenk. 23: 25. 



1885. 



386. 1904 



1913. 



' T 



Fig. 73. — Cephalocereus lanuginosus. 



Fig. 74. — Cephalocereus royenii 



Stout, 2 to 8 meters high or more, either branching near the base or with a short definite trunk 

 up to 3 dm. in diameter; branches stout, erect or ascending, glaucous, green to blue; ribs 7 to n, 

 high; areoles close together; spines acicular, very variable, often only i cm. long, but sometimes 

 6 cm. long, yellow; young areoles bearing soft wool; flowering areoles producing tufts of long white 

 hairs; flowers about 5 cm. long, greenish yellow to purplish; inner perianth -segments white, acute, 

 fruit reddish or green, 5 cm. broad; pulp red; seeds black, shining. 



Type locality: America 



St. Thomas. Culebra, Porto Rico, Mona 



and Desecheo. 



Philip Miller states that this species was 



\ , 



him from 



- V 



America 



combination Cereus royenii is generally credited to Haworth (18 

 Miller in 1768, although the true Cactus royenii of Linnaeus may 



be the one he actually described. 



