PLEISTOCENE FLORA OF NORTH CAROLINA 349 
We know that the land was low and that the country was densely 
wooded, with a high humidity, all of which are factors that ameliorate 
temperatures, so that persistent ice in comparatively low latitudes, if 
present at all, seems to have been almost entirely a question of mod- 
erate cooling in the highlands, combined with unbalanced precipi- 
tation, while the climate of the low-lying coastal plain, even as far 
northward as Maryland, did not differ greatly from what it is at 
present. 
