302 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
flora of the island. Forty-two new species, including two new genera, = 
have been discovered on the island. q 
The vegetative conditions of Margarita are much more varied than 
those of the other islands. Margarita has both a rich mountain flora” 
and also the flora of arid plains and hills. Curagoa and the others — 
possess only arid vegetative conditions. os 
In regard to the comparison of the flora with that of adjacent re- 
gions, it is much to be regretted that data are so insufficient as to lessen — 
the value of any comparison and in some cases actually to prohibit it. : 
The flora of Margarita comprises all the plants found on Coche 
three exceptions. The other small islands are probably similar in this s 
respect. La Tortuga has twenty-three out of sixty-nine plants not to 
be found on Margarita and Los Roques has four out of twenty-eight — 
not on Margarita. Though it is impossible to speak accurately of — 
Curagoa, to judge by the references cited on previous pages there are — 
about four hundred plants there of which one hundred are not on ~ 
Margarita. : 
Although there is a large list (240) of plants of Margarita not pub- 
lished as occurring in Venezuela, it is probable that a large propor : 
of them do. ‘The vegetation on the mainland (near Carfpano and — 
Cuman&) opposite Margarita is identical in appearance with that of 
Margarita | 
Trinidad has a very large flora, yet over two hundred Margexitaala : 
plants have not been reported from there, and are not in the Herbarium : 
of the Trinidad botanical gardens. 7 
The entire chain of islands to the east of the Caribbean Sea possesses | 
a vegetation consisting of many species not to be found on Margarita. 
It is of a much more luxuriant character. In the extensive flora « 3 
Porto Rico so far as can be ascertained there are less than one hun¢ | 
Margaritan plants to be found. Most of these are common to the 
American tropics. : 
In the flora of the Cayman islands it is seen that out of their two 
hundred and twenty-eight species only eighty-four are on Margan' 
The reference to the plants of the southern United States simula 
shows about a hundred from Margarita which are, however, eosin 
In the comparison of the flora with that of other regions about te 
Caribbean Sea it is evident that the flora of Margarita is largely com 
posed of plants common to many parts of the American tropics: ’ 
