284 FLORIDA GEOLOGICAL SURVEY-THIRD ANNUAL REPORT.
on the east one also 'occasionally sees small shallow ponds characterized by an abundance of mayhaw, Crataegus aestivalis, a small tree which does not seem to grow in cypress ponds at all. Both gum and mayhaw ponds seem to occur in more clayey regions than most cypress ponds.
BAYS.
(PLATE 23.2. FIG. 22)
Closely related to the cypress ponds are the bays, which seem to differ chiefly, as far as environmental conditions are concerned, in being situated on deeper sand (cypress ponds generally have clay, sometimes rock, under them within a very few feet of the surface) and having less fluctuation of water-level. For some reason not fully understood, the soil and water seem to be more acid than in the cypress ponds, and the vegetation comprises more small trees and shrubs than large trees.
Bays are especially characteristic of the Middle Florida flatwoods (e. g., San Pedro Bay), and they are also common in the West Florida coast region, and occasional elsewhere in the northern parts of the state. The following list of bay plants is compiled from notes taken in Franklin, Gadsden, Leon, Wakulla, Jefferson. Taylor, Lafayette, Alachua and Lev'y Counties.
TREES

Taxodium imbricarium (pond cypress).
Pinus Elliottii (slash pine) Pinus serotina lackk pine) MagnaOlia glauca (bay)

Nyssa biflora (black gum) Persea pubescens (red bay) Acer rubrum (maple) Gordonia Lasianthus (bay)

SMALL TREES OR LARGE SHRUBS

Cyrilla parvifolia (tyty) Ilex myrtifolia (yupon) Cliftonia monophylla (tyty)

Cyrilla racemiflora (tyty) Ilex Cassine (swamp holly) Myrica cerifera (myrtle)

SHRUBS, ETC.

Smilax laurifolia (bamboo vine) Pieris nitida -,, Pieris- phillyreifolia Hypericum fascculatum Crookea microsepala Ilex glabra (gallberry) Se noa serrulata (saw-palmetto)

Leucothoe racemosa Smilax Walteri Clethra alnifolia Aronia arbuticfolht Azalea viscosa? (swamp honeysuckle)