718 METASPERMAE OF THE MINNESOTA VALLEY. 



The tables of these nine combination groups are as follows 



20. The North-East Specific Element. 



No. of 

 species. 



Per cent, of all 

 N. E. 



N. E. per cent, 

 of each. 



Monocotyledones 24 41. 9 7.2 



Archichlamydeae 20 35.7 4.3 



Metachlamydeae 12 21.4 3.1 



Total N. E 56 



N.E. per cent of all 

 species 4.7 



21. The North- West Specific Element. 



No. of Per cent, of all N. W. percent, 



species . N. W. of each. 



Monocotyledones 6 21.4 1.8 



Archichlamydeae 15 53.5 3.2 



Metachlamydeae 7 25.0 1.8 



Total N. W 28 



N. W. per cent, of all 

 species 2.3 



22. The North-East-West Specific Element. 



No of Per cent, of all N. E. W. per 



species. N. E. W. cent, of each. 



Monocotyledones 72 36.7 21 4 



Archichlamydeae 80 40.8 17.2 



Metachlamydeae 44 22.4 11.5 



Total N. E. W 196 



N. E. W. per cent, of all 

 species 16.7 



