FEATURES AND CLIMATE OF CENTRAL PRAIRIE REGION. 97 

 upon the adjacent lower hills. Belonging to xerophile associations 



are : 



Paspalum ciliatum. 

 Paspalum dasyphyllum. 

 Panicum nashianum. 

 Muhlenbergia trichopodes. 

 Eragrostis hirsuta. 

 Gymnopogon ambiguus.^ 

 Cyperus fiUcfulmis. ^ 

 Cyperus ovidaris.^ 

 ('ommelina nudiflora.^ 



Belonging to niesophile 



Paspalum praecox. 

 Paspalum dilatatum. 

 Panicum melicarium. 

 Fuirena squarrosa hispida.^ 

 Rynchospora axillaris. 

 Carex verrucosa.^ 

 Carex debilis pubera.^ 

 Carex baileyi. 

 Kobresia odorata. 

 Xyris iridifolia. 



Commelina tnrginica.^ 



Bradburya virginica.^ 



Meibomia stricta. ' 



Breweria humisiraia. 



Clinopodium {Calaminthu) carolinianum. 



Verbena caroliniana. 



Vemonia graminifolia. 



Solidago petiolaris} 



Ladnaria elegans.^ 



associations: 



Xyris torta.^ 



Xyris caroliniana. ' 



Smilax laurifoliu. 



Atamosco {Zephyranthes) atamasco. 



Pogonia divaricata. ' 



Gyrostachys praecox.^ 



Amsonia ciliiata. 



Jacquemontia tamnifolia. 



Breweria humistrata. ' 



Brintonia discoidea.^ 



CENTRAL PRAIRIE REGION. 



PHYSIOGKAPHICAL FEATURES. 



This floral region comprises the plain of Cretaceous rocks which 

 crosses the State in a belt from 35 to 45 miles wide, its mean ele- 

 vation above the Gulf of Mexico scarcely exceeding 200 feet. It is 

 inclosed at its northern and at its southern limit between the pine- 

 clad hills, which rise from 150 to 250 feet above the depression of the 

 plain. Rarely perfectly level, the plain rises in broad swells above 

 the sluggish water courses. Westward the water courses of this 

 plain are the tributaries of the Tombigbee and Alabama rivers, and 

 toward the east they empty into the numerous bays which indent the 

 coast of western Florida or into the Chattahoochee River, It covers 

 an area roughly estimated to exceed somewhat 5,000 square miles, 

 embracing all, or nearly all, of Greene, Hale, Dallas, Lowndes, Mont- 

 gomery, Macon, and Bullock counties, and parts of Sumter, Marengo, 

 Perry, Autauga, Pike, and Russell. 



The following climatic data are furnished by the records of the mete- 

 orological station at Montgomery, extending over twenty-two years: 



Data of temperature and rainfall. 



Annual. Winter. Spring. Summer. 



Fall. 



Mean temperature degrees P. . 



Rainfall inches. . 



Cloudy days percentage. . 



63.3 

 51.4 



47 



50 



17.1 



55 



66.6 



16.74 



44 



80 



12.22 



47 



65.4 

 8.54 

 43 



^ Less frequently found north of the Central Pine belt. 

 15894 7 



