200 FLORIDA GEOLOGICAL SURVEY SIXTH ANNUAL REPORT. 



Oxydendrum. The soil is evidently too rich for some of these, while others pre- 

 fer alluvial soils or other special conditions not well developed in this region. 



The species which seem to be more abundant in this region than in other 

 parts of Florida are indicated by double + marks, as explained on page i86. 

 A few of these are confined to rock outcrops and are presumably lime-loving. 

 The tw^o commonest oaks, Quercus falcata and Q. Marylandica, appear to require 

 ferruginous soils, while some other species probably prefer this region on ac- 

 count of the abundance of humus and infrequency of fire. The Aquilegia and 

 Pachysaiidra are not known elsewhere in Florida, or even in the neighboring 

 parts of Georgia and Alabama. 



The percentages for evergreens add up only 49, which is the lowest figure 

 for any region of equal extent in Florida. Only 1.6 per cent of the shrubs are 

 Ericaceae; a very small proportion for Florida, doubtless correlated with the 

 comparative richness of the soil. The percentage of Leguminosae among the 

 herbs is 10.4, which is about the average. 



Economic Features. The long-leaf pine, the most important tinv 

 ber tree of the South, is not al>nnclant enough here to invite exten- 

 sive lumbering and turpentining operations, but it and many of 

 the other trees have been used for fuel, building material, and 

 numerous other purposes on the farms. The cedar is used for fence- 

 posts and pencil-wood. 



According to the census of 1910 Jackson County had about 30 

 per cent of its area in improved land. (Allowing 10 per cent for 

 old fields and other unclassified areas, this leaves about 60 per cent 

 forest). There were 31 inhabitants to the square mile, an increase 

 of 27 per cent since 1900, and 52 per cent of them were white. For 

 the fertile red lands under consideration, which cover a little less 

 than half of the county, the proportion of woodland must be consid- 

 erably less, the density of the population somewhat greater, and 

 the decennial increase and the percentage of whites considerably 

 less, in the rural districts at least. 



The principal crops in 19 12, in order of value, were as fol- 

 lows : Upland or short-staple cotton, corn, peanuts, sweet potatoes, 

 sugar cane, (grass) hay, oats, watermelons, velvet beans, field peas 

 including hay thereof), peaches and pecans. 



