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American Midland Naturalist Monograph No. 4 



with very slender tips; heads ^2 to % inch high, borne singly at the ends 

 of sparsely leafy stems. 



Occurrence. — ZION. GRAND CANYON, in the canyon just below the rims, 6,500 to 

 7,500 feet: upper Bass Canyon; Point Sublime. 



3. Desert Brickellia (BrickelUa desertorum Gov.). — Low spreading 

 shrub about 4 feet high; bark finely white-woolly; leaves egg-shaped, coarsely 

 toothed, blunt-pointed; 1/6 to 1/3 inch long; flowers white, 8 to 12 in a head; 

 heads I/4 to 1/3 inch high, borne in small rounded clusters at the ends of 

 short side branches. 



Occurrence. — ziON. 



4. California Brickellia (Brickellia calif ornica Torr. SC Gray) . — 

 Bushy shrub 2 to 3 feet high; herbage rough-hairy with fine hairs; leaves 

 rounded to triangular, with 3 prominent veins, irregularly toothed, y2 to 2^4 

 inches long; flowers whitish, the heads in glomerules of several, these borne 

 along the stems and forming rather narrow more or less leafy clusters; heads 



Fig. 145. Stiff-leaf brickellia {BrickelUa atract^loiJes) . 



