8 CONTENTS. 



General principles of the distribution of plants Continued. Page. 



Plant formations and plant associations 35 



Hydrophytic plant associations 37 



Xerophytic plant associations 37 



Halophytic plant associations 37 



Mesophytic plant associations 37 



General character of the flora of Alabama 37 



Systematical relations 38 



Endemic plants 38 



Relationship of the Alabama flora to that of adjoining ivgions 39 



Relationship of the Alabama flora to foreign floras 39 



Eastern Asia .'-59 



West Indies, Mexico, South America 41 



Europe and the Mediterranean region 43 



Biological and ecological relations 44 



Forest flora 44 



Shrubby plant associations 44 



Arboreal plant associations 45 



Open land or campestrian flora (xerophile plant associations) 48 



Water and swamp flora (hydrophytic plant associations) 48 



Hydrocharidean class 48 



Lithophytic and limnrcan classes 49 



Palustrian classes 49 



Organotopic flora 50 



Epiphytic plant associations 50 



Saprophytic and symbiotic plant associations 51 



Parasitic plant associations 52 



Insectivorous plants 52 



Introduced plants and their influence upon native plant associations . 53 



Naturalized plants 53 



Adventive plants 54 



Fugitive plants 55 



Plant distribution in Alabama 50 



Carolinian area or flora 57 



Mountain region 58 



Ranges of hills of the Metamorphic and older Paleozoic strata. . . 58 



Table-lands of the Warrior and Coosa Basins 69 



Physiographical features and climate 69 



Vegetation of the plateaus, mountain slopes, and higher valleys. . 70 



Region of the Tennessee River Valley 80 



Physiographical features and climate SO 



Vegetation of the table-lands and higher ridges 81 



Vegetation of the lowlands, coves, and bluffs 86 



Vegetation of the barrens and river hills 88 



Cultural plant formations 89 



Region of the Lower Hill country 89 



Gravelly hills of short-leaf pine and hardwood trees 90 



Coal Measures of the Cahaba Valley and Warrior basin 90 



Louisianian area or flora 94 



Region of the Central Pine belt 96 



Central Prairie region 97 



Physiographical features 97 



Xerophile forests 98 



Mesophile forests 99 



