TRANSACTIONS OF WAGNER 
180 ae канн 
VEGETATION OF SOUTH FLORIDA 
Andropogon tenuispatheus Nash. Sabbatia grandiflora (A. Gray) Small. 
Eustachys petraea (Sw.) Desv. Ipomoea speciosa Walt. 
Panicum virgatum L. Asclepias lanceolata Walt. 
Cyperus speciosus Vahl. Hyptis radiata Willd. 
Rhynchospora corniculata (Lam.) A. Diodia virginiana L. 
Gray. Melothria pendula L. 
Rhynchospora perplexa Britt. Eupatorium mikanoides Chapm. 
Kosteletzkya virginica (L.) A. Gray. Mikania batatifolia DC. 
Ludwigia microcarpa Michx. Solidago angustifolia Ell. 
Centella repanda (Pers.) Small. Pluchea foetida (L.) B. S. P. 
A small coastal prairie below Miami on the road to Cocoanut Grove and 
just north of that place is filled with coarse grasses and sedges and periodically 
flooded, when the salt water reaches it in very high tides. The alternation of 
the different formations at this point shows the control of edaphic conditions: 
The coast prairies occupy the marl soil, the pineland and the saw-palmetto, 
the drier rough oölitic limestone and the hammock is developed in a soil rich in 
organic matter. 
With the description of the prairie formations, the synecologic study of 
the vegetation of South Florida comes to an end. The remainder of this 
monograph will deal with special problems connected with the study of the 
vegetation as a whole, and not under the caption of any particular formation. 
The following pages are devoted in part to a floristic analysis and in part to 
a statistic enumeration. 
FLORISTIC ANALYSIS 
Enumeration of Families, Genera, and Species.—The Miami Flora* in- 
cludes 146 families, 522 genera and 878 species of seed-plants. Of these, there 
are 73 introduced genera and 82 introduced species. Twelve additional gen- 
era, which include introduced species, are not considered because they include 
native species. The Flora of the Florida Keys} includes 119 families, 408 
genera and 627 species of seed-plants; of these 83 genera include 94 species of 
introduced plants. The explanation of the fact that the flora of the Florida 
keys is poorer than the Miami flora, is found in a number of contributing causes, 
one of which is the absence of freshwater streams, another the generally drier 
* Small, John K.: Flora of Miami, New York, 1913. 
T Small, John K.: Flora of the Florida Keys, New York, 1913. 
