70 Rhodora [APRIL 
plain portions of New England, but the authors of some of them have 
not stated just what pine-barren plants are, except by implying that 
they are such species as are found also in the well known “ pine- 
barrens” of New Jersey. It would have been better however to say 
coastal plain plants, for many of these species range farther south, 
where they are not confined to the pine-barrens which constitute only 
a part of the fully developed coastal plain. 
But almost anywhere in the interior of New England, over the older 
rocks whose affinity is with those of the Piedmont region of the Mid- 
dle and South Atlantic states, can be found species (or even larger 
groups) of plants which in the South are confined to the coastal plain, 
or nearlyso. This fact has been overlooked by most botanists, doubt- 
less because until quite recently there have been few local floras in 
which a sharp distinction is made between the coastal plain and the 
older parts of the country. Since the beginning of the present cen- 
tury however there have appeared two excellent state floras, Mohr’s 
Plant Life of Alabama and Gattinger’s Flora of Tennessee, in 
which such a distinction is made. These can now be supplemented 
by some of the writer’s own observations in Georgia, most of which 
have not been previously published. 
If we study the ranges of these coastal plain plants which occur 
in New England we find that most of them extend not only south- 
ward near the coast but also westward through the northern states 
to Minnesota or thereabouts, the northern part of their ranges coin- 
ciding approximately with the area of Glacial drift. The Drift, as 
is well known, covers almost the whole of New.England, islands and 
all; and its southern boundary may be located approximately on the 
map by a line passing through New York, St. Louis, Kansas City, 
and thence northwestward. The drift overlaps the coastal plain east 
of New York, and a little in southern Illinois, but in the longitude 
of Cincinnati, Chattanooga, and Columbus, Georgia (85° W.), the 
two areas are 500 miles apart. 
Nearly all the plants to be discussed below do not range farther 
west than the rooth meridian, either in the glaciated area or in the 
coastal plain, the climate of the Great Plains region being too arid 
for them. It happens that every state east of the Plains contains 
either coastal plain or glacial drift, or both, hence no gap in the 
range of any species confined to these two regions is evident from a 
manual in which ranges are given only or chiefly by states. 
In the following list are enumerated some species or genera 
