Fage No. 



3b. Papus lacking Artemisia 3 



(sagebrush) 



26a. Heads with both ray (marginal) flowers and disc flowers; 

 plants subshrubs or shrubs. 



27a. Plants subshrubs; leaves 2 or 3 times pinnately 



parted, silky-canescent ; widely distributed through 

 western North America, Siberia, northern Asia, and 



Europe A. frigida 13 



(fringed sagebrush) 



27b. Plants shrubs; leaves not as above. 



28a. Branches spinescent; leaves 3 to 5 palmately 

 parted with segments 3-lobed, white tomentose, 

 deciduous; occurs on dry, saline plains and 

 hills from northwestern Montana west to eastern 

 Oregon and south to California, Arizona, and 



New Mexico A. spinescens 24 



(bud sagebrush) 



28b. Branches not spinescent; leaves not as above. 



29a. Leaves filiform, entire or ternately 



divided into filiform segments, silvery- 

 white canescent; heads with 2 to 3 ray 

 flowers and 1 to 6 disc flowers; occurs 

 mostly in sandy soil from Nevada east to 

 western Nebraska and south to Texas, 



Arizona, and Chihuahua A. filifolia 12 



(sand sagebrush) 



29b. Leaves narrowly cuneate, mostly finely 

 tridentate, silvery-canescent ; heads 

 smaller with to 2 ray flowers and 1 

 to 3 disc flowers; occurs in canyons, 

 gravelly draws, and dry flats from west- 

 ern Texas to California A. higelovii 9 



(Bigelow sagebrush) 



26b. Heads with disc flowers only; plants shrubs. 



30a. Plants up to 5 dm high. 



31a. Plants dwarf, less than 2 dm high. 



32a. Plants depressed, cushionlike shrubs; 



leaves 2 to 8 mm long, pinnately divided 

 into 3 to 11 lobes; limited to calcarious 

 desert soils, central and western Utah, 

 central and eastern Nevada, and northern 



Arizona A. pygmaea 19 



(pigmy sagebrush) 



78 



