280 
e hammocks consist largely of several kinds of broad-leaved 
trees characteristic of low situations, such as the cocoa-plum 
(Chrysobalanus), swamp-bay (Tamala), bustic (Dipholis), wax- 
myrtle (Cerothamnus), myrsine (Rapanea), and red-mangrov 
(Rhizophora), and usu ally sc some saw-palmetto (Serenoa) and cab- 
a 
several miles from the pine-woods, having sprung - evidently 
from seeds blown hither by erate storms. Here and there 
one meets with hammocks made up almost aoa a a dense 
growth of the saw-palmetto and ae cabbage-tree. 
The prairies were rather barren, but in many places the saw- 
grass (Mariscus) was coming into flower and the occasional lower 
parts were bright with the flowers of two marsh plants, the 
W 
; P 
the discovery of the West Indian Trema (Trema Lamarckiana). 
This shrub or tree was first found on this side of the Gulf Stream 
by the writer about six years ago on Boca Chica Key and on Big 
Pine Key. Several years later it came to our notice on Key 
sideration, where it often covers acres of lowlands. 
cold waves. On this account, it has been selected for the grow- 
ing of tender vegetables. Large areas that were formerly unfit 
for cultivation even in the dry season have been reclaimed by 
lands. Conspicuous changes in the natural vegetation have 
ta ace as crop-raising has advanced tion to the 
native vegetation that covered the prairie, we now me th 
exotic plants characteristic of more northern regions, such a’ 
the red-clover (Trifolium pratense), nonesuch (Medicago ee 
lina), alfalfa (Medicago sativa), and sweet-clover (Melilotus alba), 
