CONTEN 
Introduction 
History of the present botanical exploration of Alabama 
Plan of the present work .-..--.--.--.--- 
Systematic arrangement 
Nomenclature 
History of the earlier botanical explorations of Alabama 
William Bartram.............222---- 
Samuel Botsford Buckley .......-..-.. 
Hezekiah Gates ................--.-- 
1S. 
Beaumont, Nevius, and recent collectors.......-..-..-------------- 
General physiographical features of the State - 
Topography and geology.......---------- 
The Coastal Plain ..........-.---.-.- 
Region of Crystalline Rocks. .....---. 
Region of the Coal Measures...._--.- 
Region of the Coosa Valley .......--- 
Region of Tennessee Valley. -....-.-.- 
River SYsStem o05. Joo ost eecete ees ose 
Tennessee River.........----.------- 
Alabama River........-------------- 
Tombigbee River........-.-.-------- 
CoOsa RIVER ccccceccaae ie ce semen 
Temperature. ..... sccccesscanesaees ss 
Rainfall ..<eesdseseeceenis sé eis steiner 
Cloudiness - ...22,.2122.2ss se ese qceesse 
General principles of the distribution of plants 
Plant zones of Humboldt, based on isothermal lines ----. Piet eeeeess 
Life zones established by Merriam........ 
Boreal region .......--.------------- 
Arctic or Arctic-Alpine zone ...-. 
Hudsonian zone......---.-.----- 
Canadian zone .......----------- 
Austral region...........------------ 
Transition zone -...-...-------- 
Upper Austral zone ....-...----- 
Lower Austral zone ....-.------- 
Tropical region..........------------ 
Secondary factors influencing plant distribution ....-.--.---.----------- 
Distribution of species as depending upon geological history.........---- 
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