622 



METASPERMAE OF r lliE MINNESOTA VALLEY. 



From the facts of distribution compiled above it is possible 

 to present the following numerical statistics. 



The significance of the above figures will not be fully appre- 

 hended unless the various percentages are kept in mind. To 

 put these before the eye in a separate table will perhaps be 

 useful. In the following tabulation the relation of the various 

 range elements to the taxonomic groups and the analysis of 

 each taxonomic group according to range are presented. Such 

 a table indicates more exactly than the one previously con- 

 structed just what influence may be credited to the different 

 taxonomic groups in the general distribution of the families. 



Examination of thfe two tabulations preceding will serve to 

 indicate the principal characters, by families, of the meta- 

 spermic population of the Minnesota valley. Of the 106 

 families, 55 are of cosmopolitan range, 90 are extratropical, 83 

 tropical. Of the 90 extratropical families, 55 are also in the 

 tropics, while of the 83 tropical, 55 are also in the extratrop- 



