CEPHALOCEREUS. 



43 



Schumann refers here Cereus virens Pfeiffer (Knum. Cact. 99. 1837; Pilocercus 

 virens Lemaire, Illustr. Hort. 13: Misc. 20. 1866), but PfeifTer really did not propose a 

 new name, although the plant he described may have been diflferent from De Candolle's 

 (Mem. Mus. Hist. Nat. Paris 17: 116. 1828), which came from Mexico, for the latter is 

 definitely stated to have been sent by T. Coulter from there, and is described as a simple, 

 light green, 5-ribbed plant; it may be a Lemaireocereus. Schumann refers Cereus sub- 

 lanatus Salm-Dyck (Hort. Dyck. 337. 1834) here, but this reference is to be questioned. 

 If the two are the same the name sublanatus must be taken up instead of arrabidae. 



Cereus exerens Link (Pfeiffer, Enum. Cact. 99. 1837) was never described but given as 

 a synonym of Cereus virens. Cereus retroflcxus Pfeiffer (Allg. Gartenz. 3:380. 1835) and 

 C. reflexus Steudel (Nom. ed. 2.1: 335. 

 1840) were given as synonyms of C. 

 tilophorus. Cereus ericomus, given as 

 a synonym of Pilocereus exerens, was 

 given by Salm-Dyck (Cact. Hort. Dyck. 

 1849. 47. 1850) asasynonymof Cz)iV^W5. 



Illustrations: Schumann, Gesamtb. 

 Kakteen f. 39, as Pilocereus exerens; 

 Monatsschr. Kakteenk. 2: 4i,asPi/o- 

 cereus virens; Martins, Fl. Bras, 4-: pi. 

 40, as Cereus macrogonus; Vellozo, Fl. 

 Flum. 5: pi. 18, as Cactus hexagonus; 

 also pi. 19, as Cactus heptagonus. 



Fig. 62. — Fruit of Cephaloce- 

 reus arrabidae. X0.7. 



Fig. 63. — Ccphalocereus arrabidae. 



York 



Plate VI, figure i, shows a flowering joint of a plant brought by Dr. Rose to the New 



from 



Figure 62 shows the fruit 



collected by Dr. Rose at 



same year; figure 63 is from 



taken 



Juparyba Island, Bay of Rio de J 



same 



urbanianus 



1909. 



Pilocereus urbanianus Schumann, Gesamtb. Kakteen 193. ^897- uVhwirt ioo_l 



Cereus urbanianus B^rg^r. Rep. Mo. Box. Card. 16: 63. 1905. Not Gurke and Wungart. 1904. 



^treus uruantanu:> Dcigci, ivcp. A^^vy. ^^^. — ^ - ~ 



Simple and columnar or branching at base, sometimes 4 meters high, 3 ^"^-Z" dianjeter ; branches 

 4 to 5 cm"^ in diameter, woolly at apex ; ribs 8 to 1 2 , obtuse .spines i o to 1 3 ' f'-^^f ' "^'^^^^ "^^^^^^^^ 

 central spines distinct from the radials; flowers on one side of the stem, the ^^^^ ^ ^^„\^'^^^ 

 long brown wool and bristle-like spines often 4 to 6 cm. long; flower 3 to 4 cm. long.ovar> bearing 

 11 , , .. , , / 1 1. ^„„^c. Kiar>i' cmnoth. shinine. 



Type locality: Guadeloupe Island, West 

 Distribution: Guadeloupe, Martinique,; 

 We have not seen this soecies alive ; it is 



material 



National Museum. Specimens from 



St. George's, Grenada (W 



»-Ji.a.LCO l-NaUiUllcll IViUSCUlll. vJf^'-vAixAv.*^^ 



Broadway, No. 1766) appear to be referable to this species. 



. 1 

 -A 



n., 



