254 FLORIDA GEOLOGICAL SURVEY-TIIIRD ANNUAL REPORT.
up the slopes as the swamp increases in depth by the accumulation of peat. About Ioo feet in from the edge of this swamp the peat was found to be ten feet deep, and of fair quality. (See analysis under locality 39.) The area of the swamp was not determined, but it covers a good many acres, and there are doubtless other places of the same kind in the same general region.
GUM SWAMPS OF LEON COUNTY.
(FIG. 19)
A few miles west and south of Tallahassee, just where the red hills merge into the lower and more sandy country of the Middle Florida hammock belt, there are some non-alluvial swamps of a somewhat different type from anything seen elsewhere. Some people call them bays, probably on account of the numerous bushes in them, though the bushes are much less conspicuous than in typical bays, being here completely overshaded by the tall trees (which are mostly black gums). An interesting feature of these
swamps is that nearly all the species of plants in them are found also in the great Dismal Swamp of Virginia and North Carolina. The reason for this is not obvious, as there is not much similarity in the climate of the two places, and still less in the nature of the surrounding country. The plants which have been identified in these swamps are about as follows:

TREES
Nyssa biflora (black gum) Magnolia glauca (bay) Taxodium distichum? cypresss)

Nyssa uniflora (tupelo gum) Persea pubescens (red bay)

SHRUBS AND VINES

Pieris nitida Itea Virginica Leucothoe racemosa Smilax laurifolia (bamboo vine) Cyrilla racemiflora (tyty) (toward
edges)
Phoradendrcn flavescens (mistletoe)
HERBS
Tillandsia usneoides (Spanish
moss)
Utricularia inflata, etc. Saururus cernuus Triadenum petiolatum

Pallavicinia Lyellii

Vaccinium virgatum? (blueberry) Cholisma ligustrina Clethra alnifolia Aronia arbutifolia Cephalanthus o,:identalis (button
bush)
Pieris phillyreifolia Rhus radicans (poison ivy)
Pcly podium polypodioides (a fern)
(on trees)
Lorinseria areolata (a fern) Boehmeria cylindrica Lemna sp.

MOSSES, ETC.
Leucobryum glaucum