14b. Leaves and upper stems pubescent. Tage No. 



16a. Leaves 2.5 to 6 nun wide, 1.5 



to 4 cm long; involucral bracts 

 without thickened greenish spot 

 near tip; common in mountains 

 and upper foothills 



C. visaidiflorus 



ssp. lanceotatus 56 

 (mountain low rabbitbrush) 



16b. Leaves up to 2 mm wide, 3 cm 

 long; involucral bracts often 

 with thickened greenish spot 

 near tips; occurs on dry plains, 

 valleys, and foothills 



C. visaidiflorus 



ssp. Tpubevulus 57 

 (hairy low rabbitbrush) 



Twigs with often densely compacted tomentum or at least 

 tomentose. * 



17a. Bracts very attentuate; inflorescence mostly 



racemose C. parry i 



complex 51 

 (Parry rabbitbrush) 



18a. Flowers 10 or more per head C. parryi 



ssp. parryi 53 

 (Parry rabbitbrush) 



18b. Flowers 9 or less per head. 



19a. Inflorescence of single or paired 



heads C. parryi 



ssp. monocephalus 53 



19b. Inflorescence racemose of several to many 

 heads. 



20a. Leaves with short-stalked resin 



glands C. parryi 



ssp. asper 52 



20b. Leaves lacking stalked resin glands. 



21a. Upper leaves longer than inflores- 

 cence; flowers 8 to 10 mm long, 



pale yellow C. parryi 



ssp. howardi 52 

 (Howard rabbitbrush) 



21b. Upper leaves shorter than inflores- 

 cence; flowers 9 to 12 mm long, 

 clean yellow. 



76 



