JOHNSTON: FLORA OF MARGARITA ISLAND. 293 
OCHNACEAE, 
GoMPHIA PYRIFOLIA Griseb., Fl. Brit. W. Ind., p. 105 (1859).— No. 
20. A tree, about 3 m. high. 
TURNERACEAE. 
TuRNERA Dirrusa Willd.— No. 21. On Margarita also. 
CACTACEAE. 
CEREUS MARGARITENSIS Johnston.—On Margarita also. 
C. EBURNEUS Salm-Dyck.— On Margarita also. 
Metocactus communis Link & Otto.— No. 22. On Margarita. 
Opuntia Tuna Mill— On Margarita also. 
PERESKIA OPUNTIAEFLORA DC.— On Margarita also. 
RHIZOPHORACEAE, 
RuizopHora Manoir L.— On Margarita also. 
MYRSINACEAE. 
JacquiniA BERTERU Spreng., Syst., vol. 1, p. 668 (1825) — Further 
distribution, San Domingo. A tree, about 3 m. high. 
SAPOTACEAE. 
BumeELIA cuNEATA Sw.— On Margarita also. 
SOLANACEAE. 
Lycrum satsuM Ruiz. & Pav— No. 8. On Margarita also. 
LANUM POLYACANTHOS Lam., IIlust., vol. 2, p. 23 (1793).— No. 17. 
CoMPARISON OF THE FLorRA oF MARGARITA AND COCHE WITH THAT 
or OrHer REGIONS. 
Two different points of view may be taken in comparing the floras 
of various regions: one consists of a study of the lists of plants col- 
lected from the regions in question, and the other consists of a study 
of the types of vegetation. In using the former method one need only 
