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VEGETATION OF SOUTH FLORIDA 
| *Chrysobalanus pellocarpus С. F. W. Mey, Erythrina arborea (Chapm.) Small, 
| Callicarpa americana L., *Myrica cerifera L., and the vines, Rhus radicans L., 
i *Vitis Munsoniana Simpson, and Smilax sp. The center of this hammock 
is depressed and filled with water, forming what is called locally a ’gator hole. 
The larger hammock is situated some distance north of Detroit at 
the edge of a transverse prairie and is about a hectare in extent. Here 
are large live- oak trees, Quercus virginiana L., loaded down with such ferns as 
*Polypodium polypodioides (L.) A. S. Hitchcock, various species of bird’s-nest- 
like Tillandsias (T. fasciculata Sw., T. tenuifolia L.) and such epiphytic orchids 
as Epidendrum cochleatum L. Associated with the oaks are the doctor-gum, 
*Rhus toxiferum L., with smooth bark, gumbo-limbo, Bursera simaruba (L.) 
Sarg., *Morinda roioc L., and smaller trees, such as Пех Krugiana Loes., 
Picramnia pentandra Sw., Psychotria undata Jacq., Citharexylum villosum 
Jacq., sometimes seven meters tall, Guettarda scabra Vent., together with the 
| shrubs Callicarpa americana L., marlberry, Icacorea paniculata (Nutt.) Sudw. 
| (= Ardisia Pickeringii T. & G.), “Myrica (Morella) cerifera L. The large trees 
are draped with lianes, such as Virginia-creeper, Ampelopsis quinque- 
folia (L.) Michx., grapevine, *Vitis Munsoniana Simpson, poison-ivy, Rhus 
radicans L. The ground vegetation consists of the perennial herb, Cassia 
| ligustrina L., the fern, Ornithopteris adiantifolia (L.) Bernh., with tillandsias 
that have broken off with tree limbs and that have become established in the 
rich dark soil, through which here and there the sharp projections of the lime- 
stone rock are to be seen. The twisted limbs of the large hammock trees 
loaded with epiphytes, the dense tangled growth of the trees, shrubs, and lianes 
with a rich black soil, are in sharp contrast to the tall, straight, limbless pines, 
which together form an open, sunlit forest with an abundant ground vegetation 
growing in a drier, more porous, and rockier soil, and hence, more xerophytic. 
| The papaw, Carica papaya L., as an exotic, enters the clearings made in the 
| edge of the hammocks. It appears in the form with slender, green stem and 
relatively small fruit. 
The large hammock south of the Miami River, known as Brickell Ham- 
mock, is one of the largest and most typic in the whole state of Florida, for in 
it we find many rare and interesting tropic trees. It is about 3.2 kilometers 
(two miles) long and 1.6 kilometers (a mile) wide, extending down to the shores 
of Bay Biscayne. Through the center of it runs in a north-south direction 
the carriage road from Miami to Cocoanut Grove, 8 kilometers (five miles) 
