HARPER: PINE-BARREN VEGETATION OF MISSISSIPPI 563 
type. It is quite evident that the following species are more 
abundant in Georgia:—Taxodium imbricarium, Quercus Catesbaet, 
Pinus serotina,* Quercus cinerea, Cliftonia, Ilex myrtifolia, Nyssa 
Ogeche,* Serenoa, Quercus pumila, Aristida stricta, Eupatorium 
compositifolium, Sarracenia flava,* Chondrophora nudata, Erio- 
gonum tomentosum,* Baptisia perfoliata,* and Kuhnistera; and 
the following in Mississippi:—Pinus Taeda, Liquidambar, Quercus 
marylandica, Cornus florida, Pinus glabra, Magnolia grandiflora, 
Fagus,t Pinus echinata, Taxodium distichum, Nyssa sylvatica,t 
N. uniflora, Oxydendrum,t Magnolia macrophylla,t Chamae- 
cyparis,t Rhus copallina, R. glabra,} Sassafras, Sarracenia Sledgei,} 
Sabbatia macrophylla, Lophiola, Eupatorium capillifolium, Juncus 
Roemerianus,} Cladium,} Stokesia, Drosera filiformis Tracyi, 
and Carphephorus Pseudo-Liatris. It is significant that prac- 
tically all the species here enumerated for Georgia are typical 
pine-barren plants, while most of those noted as being more 
abundant in Mississippi are more characteristic of richer soils 
(and drier summers) farther inland. Several of the species 
common to Georgia and Mississippi, such as Pinus Elliottit, 
Taxodium imbricarium, Pinus glabra, Quercus geminata, Chamae- 
cyparis, Cliftonia, Lophiola, Drosera filiformis Tracyi, and Sarra- 
cenia psittacina, are not known west of the Mississippi River, 
while several others grow in Louisiana but not in Texas. All 
this tends to confirm the suggestion made a few years agot that 
the principal center for pine-barren plants is in Georgia, where 
they also extend farther inland than they do elsewhere. 
Very few quantitative studies of forests for areas larger than 
single counties have been made as yet, but from a few that have 
been published by the writer for other pine-barren regions the 
following percentages of evergreens have been computed: 
Pine-barrens of New Jersey (July) 74.3 per cent.§ 
Cape Fear pine-barrens, North Carolina (July) 60 per cent. || 
* Not known in Mississippi at all. : 
Not known in the Altamaha Grit region of Georgia, but all except Sarracenia 
Sledgei have been found elsewhere in South Georgia. Juncus Roemerianus and 
Cladium are chiefly confined to the neighborhood of the coast. 
t Torreya 7: 43. 
$ Bull. Torrey Club 37: 426. 1910. 
| Bull. Torrey Club 37: 416. roro. 
