FEATURES AND CLIMATE OF CENTRAL PRAIRIE REGION. 97 
upon the adjacent lower hills. Belonging to xerophile associations 
are: 
Paspalum ciliatum, Commelina virginica.! 
Paspalum dasyphyllum, Bradburya virginica.' 
Panicum nashianum. Meibomia stricta." 
Muhlenbergia trichopodes, Breweria humistrata. 
Kragrostis hirsuta. Clinopodium (Calamintha) carolinianum. 
Gymnopogon ambiguus." Verbena caroliniana. 
Cyperus filiculmis.! Vernonia graminifolia, 
Cyperus ovularis,! Solidago petiolaris.' 
Commelina nuditlora.' Lacinaria elegans." 
Belonging to mesophile associations: 
Paspalum praecox. Nyris torta,! 
Paspalum dilatatum. Xyris caroliniana.' 
Panicum melicarium. Smilax laurifolia. 
Fuirena squarrosa hispida." Atamosco (Zephyranthes) atamasco. 
Rynchospora axillaris. Pogonia divaricata.' 
Carex verrucosa.) Cyrostachys praeco..' 
Carex debilis pubera.' Amsonia cilitata, 
Carex baileyi. Jacquemontia tamnifolia, 
Kobresia odorata. Breweria humistrata,' 
Xyris iridifolia, Brintonia discoidea.' 
CENTRAL PRAIRIE REGION. 
PHYSIOGRAPHICAL 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 r..| 63.3 | 50 | 66.6 | 80 | 65.4 
Rainfall .........2220-.- eee eee eee eee eee inches... 51.4 | 17.1 | 16.74 12, 22 | 8.54 
Cloudy days ........-....0--.- 2 esse eens percentage. .| 47 55 44 47 | 43 
1 Less frequently found north of the Central Pine belt. 
15894-—7 
