JOHNSTON: FLORA OF MARGARITA ISLAND. 241 



CACTACEAE. 

 Cereus MilL 



C. CARiPENSis (HBK.) DC, Prod., vol. 3, p. 467 (1828). Cactus 

 caripensis HBK., Nov. gen. et. sp., vol. 6, p. 66 (1823). — South Hill, 

 El Valle, alt. 300 m., Johnston, no. 217, July IS. Further distribu- 

 tion, Mexico. 



C. EBURNEus Salm-Dyck, Obs. bot., p. 6 (1822). — • El Valle, John- 

 ston, no. 342, July 27. Further distribution, Cura9oa and Chili. 



C. Jamacaru DC, Prod., vol. 3, p. 467 (1828).— Tacarigua, 

 Johnston, no. 341, Aug. 15. Further distribution, Brazil. 



C MARGARiTENSis Johnston, Proc. Amer. acad. arts and sci., vol. 

 40, p. 693 (1905).— El Valle, on the hillside, Johnston^ no. 344, July 

 27. Endemic. 



C SwARTZii Griseb., Fl. Brit. W. Ind., p. 301 (I860).— Santa Ana, 

 Ernst. Found also in Jamaica. 



Mammillaria Haw. 



M. SIMPLEX Haw., S\ii. pi. succ, p. 177 (1812); Griseb., Fl. Brit. 

 \V. Ind. p. 300. — Juan Griego, Ernst. Further distribution, Haiti 

 and Venezuela. 



Melocactus Link & Otto. 



M. coiMMUNis Link & Otto in Verb, preuss. Ver. Gartenb., vol. 3, 

 p. 417, pi. 11 (1827); Griseb., Fl. Brit. W. Ind., p. 300.— Juan 

 Griego, Ernst; El Valle, plain by sea. Miller & Johnston, no. 272, 

 Aug. 3; Pt. Moreno, Jo/««5toH, no. 343, Aug. 10. Further distribu- 

 tion, West Indies. 



Opuntia Mill. 



O. leptocaulis DC in Mem. mus. Par., vol. 17, p. 118 (1828). — 

 En route El Valle to San Antonio, Johnston, no. 340, Aug. 3. Further 

 distribution, Mexico. 



O. Tuna Mill., Gard. diet., ed. 8, no. 3 (1768); Griseb., Fl. Brit. 

 W. Ind., p. 302. — Common ever}^4iere on the plains and hillsides.- 

 El Valle, Johnston, no. 218, July 4. Common in tropical America. 



Pereskia Mill. 



P. OPUNTiAEFLORA DC. in Mem. mus. Par., vol. 17, p. 76, p . 

 19 (1828).— Pt. Moreno, Johnston, no. 216. Further distribution, 

 Mexico. 



