II. TALLAHASSEE RED HILLS. 



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Polypodium polypodioides (A fern) 

 Hymenopappus 



Carolinensis (X) 

 Argemone Mexicana (X) 

 Chrysopsis Mariana 

 Amaranthus spinosus (X) Careless 

 Gerardia fasciculata (X) 

 Phytolacca rigida (X) I'okebcrry 

 Bidens coronata 

 Croton glandulosus (X) 

 Aeschynomene Virginica 



(X) 

 Euphorbia heterophylla 



(X) 

 Sorghastrum. nutans* (A grass) 



Panicum proliferum (X) (A grass) 

 Cenchrus tribuloides Sand-spur 



(and about 300 others.) 



On trees 



Sandy roadsides, etc. 



Waste places 

 Dry woods 

 Waste places 

 Old fields, etc 

 Waste places 

 Miry places 

 Waste places 



Ditches, etc. 



Waste places 



Old fields, etc. 



Ditches 



Railroads, pastures, etc 



In a region so unique in soil and topography it seems strange that 

 there are no species peculiar to it, and very few rare plants. In this re- 

 spect it contrasts strongly with the Apalachicola blufif region (No. 3). 

 Although that is much smalller than the Tallahassee red hills, and does 

 not diflfer much from many places in Georgia and Alabama, it has two 

 trees confined to, it, and several species which are rare elsewhere. There 

 are indeed many species more abundant in the Tallahassee region than 

 elsewhere in Florida, but nearly all of these are pretty widely distributed 

 in other states.t They may be divided into several categories, according 

 to the reasons for their abundance here. 



From what is known of their distribution elsewhere it seems probable 

 that the sweet gum, live oak and water oak are most abundant here be- 

 cause they like phosphorus. It is noteworthy that they all three grow 

 in the rich woods a mile east of Tallahassee, where the soil is above 

 the world's average in phosphorus, but not in the short-leaf pine woods 

 two miles east, where the percentage of phosphorus is only about half 

 as much (nor in central Illinois, where the soil is rich in almost everything 

 except phosphorus). In like manner it is inferred that the short-leaf pine 

 (Pinus' echiiiafa). dogwood, red oak, hickory {Hicoria alba), post oak, 

 black-jack oak {Quercus Marylandica) and black oak are partial to iron 

 or alumina, or both, and that Pinus Taeda, Magnolia grandiflora, Quercus 

 lanrifolia, Fagus, Ostrya, Hicoria glabra, Parthenocissus, and many shrubs 

 and herbs are common here on account of the abundance of humus. 



*Formerly called Chrysopogon avenaceus. Our plant is mostly the glaucous 

 form. S. Linneanum and 6". stcundum also occur in this region, but less abund- 

 antly. 



tAt least 70% of the species above listed grow also in the southeastern 

 corner of Virginia and neighboring parts of North Carolina, a region differing 

 considerably from this in soil, topography and climate. (See Torreya 9:223-224, 

 1909; Bull. Torrey Bot. Club 34:366. 1907; 37:420-422. 1910.) 



