364 HARPER: COASTAL PLAIN OF THE CAROLINAS 
tat which is evidently best developed in the Mississippi valley.* 
Tecoma radicans, Bignonia crucigera, Fraxinus caroliniana, Hibis- 
cus militaris, Gleditsia aquatica, Platanus occidentalis, Planera 
aquatica, Populus sp., Hicoria aquatica, Sabal glabra. Most of 
these occur somewhere in North Carolina, but probably less 
abundantly. Thirty years ago Prof. L. F. Ward { commented on 
the absence of some of the same species from Dismal Swamp. , 
Second, plants chiefly confined to hammocks and allied habi- 
tats. Polymnia Uvedalia, Batodendron arboreum, Vitis rotundifolia, 
Cercis canadensis, Magnolia grandiflora, Quercus virginiana, Fagus 
americana, Smilax lanceolata, Tillandsia usneoides, Juniperus vir- 
giniana. 
Third, plants of pine-barren ponds, a kind of habitat which, as 
already noted, seems to be more frequent in South Carolina than 
in the other two states. Asclepias lanceolata, Sabbatia campani- 
lata, Oxypolis filiformis, Ludwigia suffruticosa, Hypericum fascicu- 
latum, Polygala cymosa, Castalia odorata, Pontederia cordata, Kyn- 
chospora corniculata, Panicum digitarioides, Taxodium imbricarium, 
Pinus Elhotti. 
Fourth, plants of fresh marshes and ditches, doubtfully indige- 
nous. Sambucus canadensis, Aeschynomene virginica, Juncus effu- 
sus, Lemna sp., Limnobium Spongia, Typha latifolia, Azolla caro- 
liniana. 
Fifth, weeds, mostly from the tropics or with tropical affinities. 
Eupatorium compositifolium, Ambrosia artemisiacfolia, Polypremum 
procumbens, Passifora incarnata, Sida rhombifolia, Euphorbia mac- 
ulata, E. ertogonoides, Bradburya virginiana, Glottidium vesicarium, 
Cyperus rotundus, C. Iria, Echinochloa colona. 
Of about 30 species seen in both Carolinas but not in Vir- 
ginia, some belong to the same categories as those just mentioned, 
but the majority are typical pine-barren plants, which are rarely 
or never seen as far north as Virginia. 
A very interesting group of plants comprises those noted 
oftener within about 50 miles of Wilmington than anywhere else 
on the whole journey. Several of these were not seen in South 
So ee ae 
* See Ann. N. y. heat. Sci. 17: 74. 1906; Torreya 7: 44. 1907; Science 
Li. 4g = S41. 1907. 
t Field & Forest 3: 29. 1877. 
