2l8 FLORIDA GEOLOGICAL SURVEY SIXTH ANNUAL REPORT. 



Stop running in dry weather, as is the case in many other clayey 

 regions. Some of the ravines have small springs at their heads. 



Vegetation Types — On the sandier uplands there is a good deal 

 of long-leaf pine and its common associates, while on the more ex- 

 tensive clayey uplands and valley slopes the usual vegetation is a 

 mixture of short-leaf pines and various hardwoods (mostly second 

 growth, for the reason given under Economic features). Some oi 

 the valleys are a little sandier than others, and in such places the pro- 

 portion of evergreens seems to be above the average for the region. 

 The swamps present no striking features. 



Fire is infrequent here, as in most other places where the forests 

 are dense and the ground covered with humus, which is usually too 

 damp or too thoroughly decomposed to burn readily. 



Plants — This region is so small and remote from railroads that 

 I have been through it only twice, and consequently my vegetation 

 statistics for it cannot be very accurate. But by combining the list 

 of plants with that for Holmes Valley, another small region (to be 

 described next) with very similar flora, the chances of error are de- 

 creased, and considerable repetition is avoided. The following list 

 is based on observations made in the Knox Hill country on March 

 7, 1910, and May 6 and 7, 1914, and in Holmes Valley on May 8, 9 

 and 10, 1914. Percentage figures are omitted, because they cannot 

 be depended upon in this case. The names of plants seen only in 

 the Knox Hill country are preceded by K, and those seen only in 



Holmes Valley by H. 



TREES 



♦Also called "black pine" in the Knox Hill country. 

 tSometim.es distinguish-ed here as "rosemary pine." 



