HARPER: THE ‘PocosIN” oF PIKE County, ALA. 213 
and many other places where humus accumulates on a soil that 
is poor in animal life or not intrinsically very fertile. The bound- 
ary between the pocosin and sand-hill vegetation is not very sharp, 
but it is comparatively easy to fix it definitely enough for statis- 
tical purposes. In attempting to make a quantitative analysis 
of the vegetation, however, one encounters a difficulty in that it is 
a many-storied forest, in which there seem to be all gradations in 
- I. Sand-hill vegetation near the pocosin, with Pinus echinata, Quercus 
alae Crataegus, Batodendron, etc. 
size between large trees and shrubs, and it is not exactly right to 
include both trees and shrubs in the same list for the purpose of 
calculating percentages. The following list is divided into more 
classes than usual, and the relative position of the species within 
each class is approximately correct, but it gives no idea of the 
relative abundance of species in different classes. The illustra- 
tions, however, partly make up for this. (Fics. 3, 4.) 
LARGE TREES 
Quercus laurifolia Quercus alba 
Hicoria glabra? Prunus serotina 
Tilia heterophy "lla? Fraxinus americana? 
Magnolia grandiflora Quercus velutina 
Fagus grandifolia 
