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Polygoiiuiii Douglassii, Greene. Douglas Knot-weed. 



In the Black Hills and near Sand Lake in the James 

 valley. 

 Polygonuin Convolvulus, L. Black Bind -weed. 



A most troublesome weed in cultivated ground 

 throughout the state. 



Polygonum scandens, L,. Climbing False Buckwheat.. 

 In thickets from the Missouri river eastward. 



Polygonum Sawacheiise, Small. Western Persicaria. 

 Near Custer, in the Black Hills. 



CHENOPODIACE^. The Goosefoot Family. 



Cheiiopodium album, L. Lamb's-quarter. Pigweed. 



A weed naturalized in waste places throughout the 

 state. 



Cheiiopodium glaucum, L. Oak -leaved Goosefoot. 



A weed naturalized; it prefers low, alkaline soils; in 

 the Minnesota and Sioux valleys. 



Chenopodium leptophyllum, (Moq,) Nutt. Narrow- 

 leaved Goosefoot. 

 In the Black Hills. 



Chenopodium leptophyllum oblongifolium, Wats. 

 The Oblong-leaved Chenopod. 



Near the Cheyenne river, east of the Black Hills. 



Cheiiopodium Boscianum, Moq. Bosc's Goosefoot. 

 In woods in the Minnesota region. 



Cheiiopodium Fremontii, S. Wats. Fremont's Goose- 

 foot. 



In damp woods in the Black Hills. 



Cheiiopodium Fremontii iiicaimm, S. Wats. 

 In the Black Hills. 



Cheiiopodium hybridum, L. Maple-leaved Goosefoot. 



In open woods in the Minnesota and Sioux valleys, 

 and in the Black Hills. 



