No. 7— CONTRIBUTIONS FROM THE GRAY HERBARIUM 
OF HARVARD UNIVERSITY. NEW SERIES.— NO. 
XXXVIT. FLORA OF THE ISLANDS OF 
MARGARITA AND COCHE, 
VENEZUELA. 
BY JOHN ROBERT JOHNSTON, M.S 
iui 
CONTENTS. 
Page. 
General considerations on the flora of Venezuela — Variety of vege- 
tative conditions — Desirability of further ghia: — ae 
ration and botanical work . . 163 
Flora of the — of 2a tines ; ; i : : : ‘ 167 
Introduct i 167 
— eta — Topography —_ Reinke: vad eh —_ 
: 168 
Geille et Nite : q é : : ' ; 175 
The economic plants of Margarita : 270 
Distribution of the plants — Regional dintribtti ica “> Group- 
ing — Paucity of specimens — eee ees and barriers to 
dispersal — Seasonal distribut 278 
Composition of the flora — The a oe the cosmopolitan, 
and the plants of restricted distribution — The variety of 
ois and the groups most largely me niece . : 5 283 
The flora of the Island of Coche ; : : : 288 
Description of the — seiiclibioe ‘ ee . ‘ 288 
Catalogue of plant 291 
Comparison of the a of Marans and Guahe with that of eee 
regions — Methods of comparison — Other Venezuelan 
islands — The mainland —The West Indies — Southern 
| States : . 293 
Conclus ; i : 301 
canon of geaurephienl wail bohiaatent publications iw 304 
GENERAL CONSIDERATIONS ON THE FLORA OF VENEZUELA. 
ProrEssor Goebel’s (’91) most interesting account of the vegeta- 
tive conditions to be found on the Cordilleras of Merida in Venezuela 
cy is descriptive of an excellent field for botanical research. Within 
150 kilometers (93 miles) of the shores of Lake Maracaibo the moun- 
163 
