11. THE LIME HILLS. 



105 



erage temperature is about 65°, and the average annual 

 rainfall about 50 inches. The four warmest months get 

 more than their share of rain, but the six warmest 

 months get a little less. (In this and several other cases 

 it appears that the contrast between summer and winter 

 rainfall is better exhibited by taking the figures for four 

 months than for six.) 



Forest types. — The limestone outcrops are character- 

 ized by cedar, redbud, mulberry, and other trees that are 

 sensitive to fire, usually draped with "moss" (Tillaridsia 

 usneoides) ' The drier uplands have various oaks, short- 

 leaf pines, and occasionally long-leaf pine, the latter 

 seeming strangely out of place among such dense vegeta- 

 tion. The forests on loamy slopes and in bottoms are 

 mainly of the hammock type, with magnolia, beech, 

 spruce pine, etc. Fire is infrequent. 



LIST OF TREES. 



10-8 Pinus palustris 



10-12 Pinus Taeda 



3-3 Pinus echinata 



5-6 Pinus glabra 



2-2 Taxodium distichum 



4-2 Juniperus Virginiana 



0-0 Juglans nigra 



1-1 Hicoria aquatica 



2-1 Hicoria alba 



1-2 Salix nigra 



1-1 Populus deltoides 



1-1 Carpinus Caroliniana 



1-1 Ostrya Virginiana 



2-2 Betula nigra 



4-4 Fagus grandifolia 



5-3 Quercus alba 



1-1 Quercus stellata 



1-1 Quercus Durandii 



0-0 Quercus Muhlenbergii 



1-1 Quercus Michauxii 



2-2 Quercus falcata 



0-0 Quercus Schneckii 



0-1 Quercus Catesbaei 



1-1 Quercus Marylandica 



0-1 Quercus cinerea 



Long-leaf pine 

 Short-leaf pine 



Short-leaf pine 

 Spruce pine 

 Cypress 

 Cedar 



Black walnut 

 (Swamp) hick- 

 ory 

 Hickory 

 Willow 

 Cottonwood 

 Ironwood 



Birch 



Beech 

 White oak 

 Post oak 



Swamp chest- 

 nut oak 

 Red oak 



Turkey oak 

 Black-jack 

 oak 



Dry soils 

 Generally distrib- 

 uted 

 Dry soils 



Ravines and bluffs 

 Swamps 

 Rock outcrops 

 Limestone slopes 

 Along creeks, etc. 



Dry woods 

 Along streams 

 River-banks, etc. 

 Creek-swamps, etc. 

 Ravines and bluffs 

 Along creeks and 



rivers 

 Bluffs and bottoms 

 Bottoms, etc. 

 Dry woods 

 Limestone outcrops 

 Limestone outcrops 



Bottoms 

 Dry woods 

 Calcareous soils 

 Sandy soils 



Dry woods 

 Sandy soils 



