HARPER: VEGETATION OF THE COASTAL PLAIN 427 
Some of the differences are: The sand is coarser in New Jersey, 
and there seems to be no clay subsoil, and no ponds. The dom- 
inant pines and oaks are different (and the range of Pinus rigida 
does not even overlap that of P. palustris, and still less that of 
P. Elliottii). Shrubs are much more abundant (in individuals, 
not necessarily in species) in New Jersey, and herbs, especially 
grasses, correspondingly sparse. The southern pines are among 
the most valuable trees we have, while the northern ones are 
small and crooked, and even if they were larger they would be of 
little use except for fuel. Chamaecyparis is commoner in New 
Jersey than it is in pine-barrens of any other state. 
The New Jersey pine-barrens probably find their nearest 
counterpart in those of Long Island, which I described about two 
years ago.* The principal difference is that those of New Jersey 
have more bogs to the square mile, and a richer flora even in the 
dry pine-barrens. New Jersey seems to have all the pine-barren 
plants that Long Island has, and several more besides. Of those 
listed above, Pinus echinata and Lophiola are not known on Long 
Island, while Chamaecyparis, Quercus marylandica, Q. Prinus, 
Lilium, and Habenaria do grow on the island but apparently 
not in the pine-barrens thereof. 
On the whole trip from Savannah to Barnegat Pier, which in- 
volved about 775 miles of note-taking, the number of species of 
plants seen from the train (this excludes about 25 species which I 
saw only near Hamlet, as above explained) was about 220. Of 
these 61 were seen in Georgia, 103 in South Carolina, 135 in North 
Carolina, 70 in Virginia, and 50 in New Jersey. (The diversity 
of these figures of course depends more on the different distances 
traveled in each state than anything else, for the number of species 
seen on any route is probably approximately proportional to the 
square root of the distance, when other things are equal.) 
About 100 of these plants were not seen often enough in any 
one region to be mentioned in this paper. Of those that are 
mentioned by name, 3 are ferns, 10 conifers, 22 monocotyledons 
and 88 dicotyledons; but ten or twelve of the dicotyledons are 
weeds. Some generalizations with respect to the distribution of 
the remaining 112 native species may be of interest. 
*Torreya 8: 1-9. 1908. 
