6B. LONG-LEAF PINE HILLS. 



79 



in Tuscaloosa County to Trio in Bibb, a distance of about 

 30 miles. Streams are fairly numerous, but mostly 

 small, and many of the smaller valleys are dry a large 

 part of the time. The water in the ground and in the 

 streams is above the average in purity, and it does not 

 seem to fluctuate much. Where the M. & 0. R. R. passes 

 through this belt in Chilton and Autauga Counties it has 

 at least two water-tanks fed automatically by pumps op- 

 erated by breast-wheels located on small creeks. 



A minor topographic feature which reaches its inland 

 limit in this kind of country is the salamander hills, 

 small mounds of sand thrown up in long-leaf pine forests 

 (especially soon after fires in winter and spring) by the 

 salamander, a subterranean rodent which lives in sandy 

 soils in the coastal plain from the Warrior River east- 

 ward to the Savannah.* 



Forest types. — Reed, in his excellent description of a 

 part of this region, recognizes only two types of forest, 

 the long-leaf pine type on the hills and the creek type in 

 the valleys. Each could be subdivided somewhat, how- 

 ever, especially the last, for streams of different sizes are 

 usually bordered by different kinds of swamp vegetation. 

 Fire is frequent in the long-leaf pine land. 



LIST OF TREES. 



^See Science 11.35:115-119, Jan. 19, 1912. 



