FOREST CENTERS OF EASTERN AMERICA. 
EDGAR N. TRANSEAU. 
AN examination into the distribution of the forest trees of 
eastern North America develops the fact that there are several 
natural vegetation centers. Adams (: 02) called attention to the 


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Fic. 1.— Map showing distribution of several of the dominant Conifers of the N 
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Conifer center. The relative intensity of shading indicates the relative number of species 
found in the region. 
distinctness of the biota of northeastern and of southeastern 
America, and showed that they are to be regarded as centers of 
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