GEOGRAPHY OF CENTRAL FLORIDA 89

 (Fig. 6.) Several of the smaller streams have large limestone springs at their heads. (Fig. 7.)

















 Fig. 7. Large limestone spring at head of Homosassa River about a mile northeast of Homosassa, Citrus County. May 23, 1909.
 Soils. Only a small part of this region has been covered by soil surveys (those of the "Ocala area" and Hernando County), so that it is hardly worth while to try to estimate the percentages of the diffe rent types of soil. The principal series thus far named are the "Leon", "Norfolk", "Portsmouth", "Hernando" and "Parkwood", and the texture classes, in order of area, are fine sand (about onethird of the total), swamp, sand, muck, fine sandy loam, tidal marsh, and clay loam. Rock outcrop, presumably all limestone, constitutes about one-third of I% of the total area as mapped. Where the sand is not too deep, particularly in all the low hammocks and swamps, the influence of lime is plainly shown in the native vegetation. In a few such places there are deposits of gypsum on or near the surface. No chemical analyses of the soils of this region are available, but they are probably more calcareous than the average for central Florida.
 T'cgctation. The vegetation is mostly of the flatwoods type, with a few lime-loving plants, but low calcareous hammocks are more frequent and extensive in this region than in any other, with the possible exception of the east coast. .(The great Gulf Hammock in Levy County, shown in fig. 5, is the most typical example.) 'The