SOIL SURVEY OF PINELLAS COUNTY, FLORIDA. 323 
The Parkwood silty clay loam is residual in origin and has been 
derived from the underlying soft and impure limestone and deposits 
of marl. It occupies poorly drained depressions and flats. The 
natural vegetation consists of live oak, water oak, white oak, myrtle, 
bay, sweet gum, and cabbage and saw palmetto. 
Only one area of Parkwood silty clay loam was mapped in the 
county. It is situated in the southern part of the county at the 
western end of Salt Lake. It is neither cleared nor under cultiva¬ 
tion, and better drainage will have to be established before it can 
be used for agriculture. In the vicinity of Coleman, Fla., the same 
type of soil has been found to be productive where good drainage 
has been established. It is used there in growing citrus fruits, which 
are of good quality, and for trucking, tomatoes and cabbage being 
the important crops. 
Plummer Series. 
The soils of this series are gray and frequently mottled with 
dark-brownish colors and underlain at a depth varying from 8 to 
20 inches by compact, light-gray material more or less mottled with 
streaks of brown and yellow. The lower portion of the subsoil 
usually consists of sandy clay or sticky sandy material, including 
pockets or layers of yellowish, plastic sandy clay. The soils are 
derived from reworked Piedmont-Appalachian material. They are 
nearly always in a sticky condition, water frequently standing 
on the surface after heavy rains. A scattered growth of cypress 
and pine, and occasionally cabbage palmetto constitutes the principal 
tree growth. This series is typically developed in the flatwoods 
region of the South Atlantic and Gulf Coastal Plain. 
PLUMMER FINE SAND. 
The Plummer fine sand consists of a brownish-gray to whitish 
fine sand, from 8 to 15 inches deep, underlain by a brown or brown¬ 
ish-gray fine sand to a depth of 36 inches. 
A thin layer of material—accumulated deposits of material re¬ 
sulting from repeated inundations—gives the immediate surface a 
dark color. Upon drying this layer cracks and curls and is very 
brittle and friable. 
The plumimer fine sand is confined to the northeastern part of 
the county. It occurs as flat areas in which are found many shal¬ 
low depressions and ponds separated from one another by slightly 
higher, narrow bodies of land. 
