Flora of Denver. 27 



215. Anthemis Cotula L. . (MAYWEED.) (DOG-FENNEL.) 

 Sparingly introduced. North Denver. 



216. Achillea Millefolium L. (YARROW.) Rays of small 

 heads from white to rose color. Along the Platte, Clear Creek, 

 and Cherry Creek. Summer to fall. 



217. Chrysanthemum Leucanthemum L. (Ox-EYE DAisy. v 

 WHITE WEED.) Sparingly introduced along the Platte. 



218. Artemisia biennis WILLD. WORMWOOD. Stem usu- 

 ally solitary, very leafy panicle pyramidal, the small greenish 

 brown almost sessile heads crowded on the branchlets. Com- 

 mon. Summer and fall. Strong odor. 



219. Artemisia ftigida WILLD. Stems many from the 

 root, very white with silky hairs, about a foot high; leaves 

 much divided into linear lobes, heads panicled, loosely clus- 

 tered on the 1 branchlets, drooping. Common on the plains 

 and in the mountains. It is used as a tea in mountain fever. 

 Summer and fall. 



220. Artemisia Canadensis MlCHX. Leaves clustered at 

 the root twice parted into linear lobes, upper leaves more sim- 

 ple and somewhat white-woolly, panicle narrow, heads small 

 and smooth, slightly drooping. Along the Platte. Fall. 



221. Artemisia tridentata NUTT. (BLACK SAGE.) Much 

 branched, woody, canescent leaves with three obtuse teeth or 

 lobes at the truncate apex. North Denver. Fall 



222. Artemisia Ludoviciana NUTT. Branching somewhat 

 from the base, herbage very white with cottony pubescence 

 which can be rubbed off, branches of the panicle erect, heads 

 almost sessile and erect, leaves entire or few toothed. Com- 

 mon. Fall. 



