194 HANDBOOK 14S, U.S. DEPARTMENT OF AGRICULTURE 



Upper leaf-surface 



Antelope bitterbrush 



K-494118 



glands, appearing jointed because of encircling 

 stipule scars; scaly winter buds in axils of persistent 

 leafstalk bases to which stipules are attached, 

 developing into leafy spurlike twigs; bundle trace 1 

 for leaf and 1 on either side for the attached stipules; 

 flowers funnel-shaped, with 5 yellow spreading 

 petals, solitary at tips of short side twigs; "seeds" 

 (achenes) to }{ inch long, spindle-shaped, grooved, 

 tipped by persistent tapering style; typically tall 

 and rigidly branched shrubs or else moundlike and 

 with arching branches, but often low and prostrate 

 after long overbrowsing; open places in ponderosa 

 pine or with sagebrush, e. Oreg., e. Wash. 



antelope bitterbrush (Pwshia tridentata) . 

 28. Leaf margins not rolled under; leaves densely 

 white- gray- or silvery-hairy on both sides; variable 

 in size and shape (especially new spring leaves and 

 the often entire ones on the flowering shoots), single 

 or clustered and in all stages of development; twigs 

 and branches erectly parallel, of 2 kinds: (a) 

 perennial, evergreen-leafy shoots and (b) annual, 

 leafy-bracted, drying-persistent, flowering shoots; 

 scaly winter buds lacking; dwarf to tall shrubs with 

 sagebrush odor and taste; arid places, e. Oreg., 



e. Wash sagebrushes (Artemisia spp.). 50 



29. Leaves of evergreen-leafy shoots mostly reversely 

 lance-shaped and deeply 3-lobed at tips (lobes 

 sometimes again 3-cleft), or some entire and 

 linear (as are many on the flowering shoots), or a 

 few lobed to the middle (pinnatifid), to nearly \)'i 

 inches long; flower-head clusters (panicles) usually 

 much-branched, rarely spikelike; leafy bracts of 

 flower heads not overtopping end clusters (as 



50 See George H. Ward. Artemisia, Section Seriphidium, in North America. 

 Ci/totaxonomic Study. Dudley Herb. Contrib. 4 (6): 155-205. Dee. 1953. 



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