216 University of California Publications in Botany. [VOL. 3 



Stems woody, intricately branched, 1 to 5 dm. high, the per- 

 sistent branches becoming stout spines : herbage white-tomentose. 

 especially the young branchlets: leaves about .5 to .7 cm. long 

 including the petiole, pedately 5-parted and the divisions 3-lobed. 

 the lobes spatulate: heads in short lateral spikes: involucre glo- 

 bose, 3 mm. in diameter; bracts 5 or 6, obovate, obtuse: flowers 

 5 to 12, both corolla and achene loosely arachnoid with long 

 crisped hairs. 



Southern part of the Mohave Desert (Rabbit Springs, Hes- 

 peria, Lancaster, etc.), north and east to Oregon and Wyoming. 

 Plentiful in sandy soil from Owens Valley to the Panamint Mts. 

 Flowering period earlier than of other Artemisias and the habit 

 different, but plainly congeneric with them. 



2. A. dracunculoides Pursh, Fl. ii. 742 (1814). 



Six to 12 or 15 dm. high: stems not woody, either virgately 

 or paniculately branched above : herbage glabrous, strong- 

 scented: leaves linear, 2 to 10 cm. long, 2 to 4 mm. wide, entire 

 or the lowermost 3-toothed or -cleft : heads numerous, on very 

 slender short peduncles in a close or open panicle, the clusters 

 sometimes secund on the slender branches : involucre nearly hem- 

 ispheric, 2 or 3 mm. high : receptacle hemispheric. 



Common throughout western North America ; with us ranging 

 from the seashore to 2500 m. alt. in the mountains, and from 

 National City, San Diego Co., north. 



3. A. Californica Less., Linnaea vi. 523 (1831). HILL-BRUSH. 

 Gray shrub, 6 to 12 dm. high : herbage aromatic, clothed with 



a minute appressed pubescence, varying to green and nearly gla- 

 brous: leaves once or twice parted into linear-filiform segments, 

 or the upper ones entire and more or less fascicled : heads many, 

 in long racemose panicles, nodding: involucre hemispheric, 2 or 

 3 mm. high : achenes with a minute squamellate crown. 



Common on hills of the Upper Sonoran Zone from Lower 

 California (Guadalupe Island, Francesclii, no. 11) north to San 

 Francisco Bay; most plentiful toward the coast (including Santa 

 Catalina Island) but ranges as far inland as the borders of the 

 desert in San Gorgonio Pass (Cabazon, Scliellenger, no. 44). 

 Specimens from the islands have broader and thicker leaves with 



