an 



Artemisia filifolia, Torr. Silvery Wormwood. 



In the Bad Lands country just east of the Black Hills. 

 Artemisia frigida, Willd. Wormwood Sage. 



In loose gravelly soils throughout the state. 



Artemisia biennis, Wild. Biennial Wormwood. 



Introduced from the Missouri valley eastward. A bad 

 weed, native of the Northwest Territory. 



Artemisia serrata, Nutt. Saw-leaved Mugwort. 

 In thickets and on low ground, not common. 



Artemisia longifolia, Nutt. Long-leaved Mugwort. 



On the dry plains from the Missouri valley westward, 

 occasional in the James valley. 



Artemisia giiaphalodes, Nutt. Prairie Mugwort. 

 Abundant on prairies throughout the state. 



Artemisia caiia, Pursh. Hoary Sagebrush. 



On the dry plains from the Missouri valley westward. 



Petasites sagittata, (Pursh.) Gray. Sweet Coltsfoot. 

 In the Black Hills near Rochford. 



Arnica cordifolius, Hook. Heart-leaved Arnica. 

 On shady hillsides in the Black Hills. 



Arnica alpina, (L.) Olin. Arctic Arnica. Mountain To- 

 bacco. 



In canons and on shady banks in the Black Hills. 



Senecio iiitegerrimus, Nutt. Entire-leaved Groundsel. 

 Occasional in the Minnesota and Sioux valleys and in 

 the Black Hills. 

 Seiiecio lugens, Richards. Black Tipped Groundsel. 



On prairies in the Sioux and James valleys and in the 

 Black Hills. 



Senecio caiius, Hook. Silvery Groundsel. 



In dry soils in the Black Hills, a common and variable 

 species. 



