FREE INSTITUTE OF SCIENCE 
VEGETATION OF SOUTH FLORIDA 
189 
Cypress Swamp Formation. 
Prairie Formation. 
Everglade Formation. 
Rosemary Formation. 
Custard-Apple Formation. 
At present, there is slight displacement taking place, although most of the 
types are exclusive. The pine forest is being invaded by hammock vegetation. 
The Everglades is being entered by broad-leaved shrubs and trees, which are 
found as islands, or hammocks, scattered here and there in the saw-grass marsh. 
The mangrove swamps are advancing seaward and are filling the shallow bays 
with islands of trees. A depression of the country would inaugurate changes, 
which would destroy the pine forest, beach vegetation, hammocks, cypress 
swamps and mangrove swamps. An elevation would destroy the Everglades, 
and would encourage the pine forest, the rosemary scrub and the hammock 
vegetation. 
The attempt has been made in the foregoing to describe the vegetation 
of the region. Edaphic conditions are more important than climatic in an 
area of this size. All disturbing climatic factors can be eliminated from con- 
sideration and we are left to determine scientifically the influence of the im- 
portant soils on the plant formations of the region. The thanks of the author 
are extended to friends, who have helped in the preparation of this monograph. 
Everglades-grasshopper (Rhomalea microptera). 
