STATISTICS OF METASPERMAE. 741 
From Table H the following statistics are compiled: 
33. The Shrubby Specific Element. 
No. of |Per cent. of all] Shrubby per 
species.| shrubby sp. | cent. of each. 
Monocotyledones............. “2 1.9 0.6 
Archichlamydeae............ 75 72.1 16.3 
Metachlamydeae............ 7a 25.9 sk 
Total Shrubby ...... wiea| DOF leeweeeeesegasdndleess setae canes Be 
Shrubby percent.ofall species]! 8.8 [...... cece cece ee leeee ee tere teeees 
The remainder of the Metaspermae of the Minnesota valley 
may be classified as herbaceous, and of this element the sta- 
tistics are as follows: 
34. The Herbaceous Specific Element. 
No. of {Per cent. of all]Herbaceous per 
species.| herbaceous. | cent. of each. 
Monocotyledones............. 331 32.4 99.4 
Archichlamydeae............ - 340 33.4 74.0 
Metachlamydeae ............ 346 34.0 91.0 
Total Herbaceous........ WONT loscideedeaweiess haved avy des eens 
Herb. per cent. of allspecies..} 86.6 |......e cee cece ee fee ee ence en cee ee 
From the above three tabulations it is seen that the herbace- 
ous percent. of the Monocotyledones is generally in excess of 
the herbaceous per cents of the other two groups. And the 
woody percentage of the Archichlamydez is generally in ex- 
cess of the woody percentages of the other two groups. In the 
latitude of the Minnesota valley many of the original mono- 
cotyledonous trees or shrubs have disappeared. All of the 
trees are gone and all but two of the shrubs have failed up to 
the present time to secure or regain a foothold. This we un- 
derstand from the considerations indicated in the pre- 
