No. 468.] AMERICAN FOREST CENTERS. 879 
Hicoria alba. Of these species the most hardy are the beech 
and the maple. In many places in the northern states the latter 
occupies areas almost to the exclusion of other trees, while 
within the southeastern center it is only one of many species in 


















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;—— —— ——, Fraxinus americana, 
uous forest center. ---7-7^» Acer saccharum ; , Fraxi ; 
7 ie De aiia, comm» Magnolia acu- 
——.—— - Fagus americana, —— 
minata; ———, Liriodendron tulipifera. 
the forest. This may be explained, not by the statement that 
the maple is a northern tree, but by the fact that its shade- 
enduring and shade-producing properties find no worthy com- 
petitor among the trees of the Northeastern Conifer formation, 
while at the south it is one of many species having the same 
characteristics. ; | 
of the southern Appalachians there is 
In the mountain region 
