PRELIMINARY REPORT ON PEAT. 
247 
HERBS 
Tiillandsia usneoides (Spanish 
moss) 
Polypodium polypodioides (a fern) 
(on trees) 
Dichondra Carolinensis 
Tillandsia sps. (air-plants) 
Calophanes sp. 
Salvia lyrata 
MOSSES, ETC 
Brachelyma robustum Porella pinnata 
wSome of these plants are species which seem to be pretty fond 
of limestone—and there is a little of that in the water of all these 
streams—but probably none absolutely require it. The above 
list probably resembles that for the swamps of the upper Apalachi¬ 
cola River more than any other mentioned herein, although the 
order of relative abundance is somewhat different, and there seem 
to be a good many more vines in these swamps than in the muddy 
ones. This similarity of vegetation, like that between the estuaries 
of the Apalachicola and Suwannee Rivers, already pointed out, 
seems to indicate once more that the amount of fluctuation of the 
water-level is more important to some plants than the chemical 
properties of the soil or water. 
The upper St. John’s River is also a fluctuating stream with es¬ 
sentially non-calcareous water, but the vegetation bordering it, ex¬ 
cept where there are swamps fed by seepage from the land, is 
mostly of the prairie type (i. e., mostly herbs), and it would hard¬ 
ly be proper to correlate it with this. And as it forms no peat it 
may as well be omitted for the present. 
