138 



Polyj>oimin Doiiglassii, Greene. Douglas Knot-weed. 



In the Black Hills and near Sand Lake in the James 

 valley. 



Polygonum Convolvulus, L. Black Bind-weed. 



A most troublesome weed in cultivated ground 

 throughout the state. 



Polyg'onuni sfaudeus, L. Climbing False Buckwheat. 

 In thickets from the Missouri river eastward. 



Polygonum Sawachense, Small. Western Persicaria. 

 Near Custer, in the Black Hills. 



Chenopodiace^. — The Goosefoot Family. 



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



A weed naturalized in waste places throughout the 

 state. 



€henoi)0<lium giaucum, L. Oak -leaved Goosefoot. 



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

 the Minnesota and Sioux valleys. 



Clienopodium leptophyllum, (Moq.) Nutt. Narrow- 

 leaved Goosefoot. 

 In the Black Hills. 



Clienopodium leptoiiliyllum oblongifolium, Wats. 

 The Oblong-leaved Chenopod. 



Near the Cheyenne river, east of the Black Hills. 



Clienopodium Boscianum, Moq. Bosc's Goosefoot. 

 In woods in the Minnesota region. 



Clienoi)odium Fremontii, S. Wats. Fremont's Goose- 

 foot. 



In damp woods in the Black Hills. 



Clienopodium Fremontii incanuin, S. Wats. 

 In the Black Hills. 



Clienopodium liybriduin, L. Maple-leaved Goosefoot. 

 In open woods in the Minnesota and Sioux valleys, 

 and in the Black Hills. 



