638 
METASPERMAE OF THE MINNESOTA VALLEY. 
B. Table Illustrating the Distinctive Range of 
COSMOPOLITAN. 
EXTRATROPICAL. 
TROPICAL AND 
SUBTROPICAL. 
COLCOPSIS\.< oc S.nasssnemenl ede oe ead Ade beniomeres hese catalina aes Secbeas 
VCCTIS e.auscezs ag ons Rizk de acsceval |fereie we es-d <b: bod avindua oh ahoragtiend,sial|l emoe ea tata eanerelaaca IN ee Folare ha 
Fea idek hobs ni cel EOE Cie caiiac lee cutee aucniteceek es 
Arpenoiisia ahve ses 406d eta BeeS Gia dae ob Cea el aus emomaniee aca see hae ee 
SCHECIOmaeayesoceces peMel MAGIK Sr addae HE ReeeeaNiheeeke imearawebeeres axes 
PTAA aS Rene Raa ae GnicusS +26 ya secenugdesileresa weweereoeer tenes 
SO lasers aiaisa se dhes te Se S AS FABER WbdCtUCavaanis cdaGad ns cpedes ceanntiandaiek het oes 
asa ansieiee dikes bhi beable baie tego a eSB a nS. G aimee lectramnabee woe TaTaXaACUMy 4s. 2 scccccs 
eesti p49 eaua'eeuy aedipaln ovca cua a vuny meets le eM eieaweyateg xine 
The facts of distribution compiled in the foregoing tabulation 
will be better apprehended if presented separately, by groups, 
and such separation and grouping of the statistics is indicated 
in the following six tables. I have named the group of genera 
for which a distinctive range has been determined a ‘‘generic 
element.” The six generic elements of the preceding tabulation 
are now considered in succession. The numerical statistics 
and the two groups of percentage statistics are displayed side 
by side. The tables, then, show the number which each tax- 
onomic group furnishes to the generic element, the percentage 
that this number is of the whole generic element and the per- 
centage of the taxonomic group that may be considered as be- 
longing to each generic element. These generic elements may 
