80 





i' 





*.v c : 



Plate 33.— Classification: system Palustrine, CLASS Unconsolidated Bottom, subclass Mud, water regime Semipermanently 

 Flooded, water chemistry Fresh- Alkaline, soil Mineral, special modifier Impounded. A sparse stand of water plantain 

 {Alisma plantago-aquatiea) appears along the edge of the impoundment. (Billings County, North Dakota; July 1970; Photo 

 courtesy of J. Lokemoenl 



