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WEED FLORA OF IOWA 



Fig. 54-A. Distribution of Water Pepper. 



Distribution. — Water pepper is distributed in swamps from east- 

 em Canada southwest to Mexico; it is also distributed across the 

 northern states to California ; common in low wet places in many 

 parts of Iowa. 



Fig. 54-B. Water Smartweed (.Polygonum acre). 



