Ih-^ 
No. 7.— CONTRIBUTIONS FROM THE GRAY HERBARIUM 
OF HARVARD UNIVERSITY. NEW SERIES.— NO. 
XXXVII. FLORA OF THE ISLANDS OF 
MARGARITA AND COCHE, 
VENEZUELA. 
BY JOHN ROBERT JOHNSTON, M. S. 
Contents. 
Page. 
General considerations on the flora of Venezuela — Variety of vege- 
^ tative conditions — Desirability of further collecting — Explo- 
ration and botanical work ....... 16.3 
Flora of the Island of Margarita ....... 167 
Introduction .......... 167 
Physical features — Topography — Rainfall and clouds — 
Temperature . . . . . . . . . 168 
Catalogue of plants ........ 175 
The economic plants of Margarita ...... 270 
Distribution of the plants — Regional distribution — Group- 
ing — Paucity of specimens — Adaptation and barriers to 
dispersal — Seasonal distribution ..... 278 
Composition of the flora — ■ The cultivated, the cosmopolitan, 
and the plants of restricted distribution — The variety of 
plants and the groups most largely represented . . . 283 
The flora of the Island of Coche 288 
Description of the vegetative conditions ..... 288 
Catalogue of plants ........ 291 
Comparison of the flora of Margarita and Coche with that of other 
regions — Methods of comparison — Other Venezuelan 
islands — The mainland — The West Indies — Southern 
United States 293 
Conclusion . . . . . . . . . . .301 
Literature of geographical and botanical publications . . . ;^04 
General Considerations on the Flora of Venezuela. 
Professor Goebel's ('91) most interesting account of the vegeta- 
tive conditions to be found on the Cordilleras of Merida in Venezuehi 
is descriptive of an excellent field for botanical research. Within 
150 kilometers (93 miles) of the shores of Lake INIaracaibo the moun- 
163 
