MAY, 1912. No. 9. 
americas MIDLAND 
NATURALIST 
Devoted to Natural History, Primarily 
4 that of the Prairie States 
" 
. Published by the University of Notre Dame, 
> Notre Dame, Indiana 
bs 
eee J. A-NIEUWLAND, C.S. C., Ph. D., Editor 
E Rie 
b 
ee OUR AMPHIBIOUS PERSICARIAS. 
BY J. A. NIEUWLAND. 
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