KEY TO IMPORTANT WOODY PLANTS 



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51. Leaves linear (to % inch wide), usually hairy; 

 herbage not odorous; twigs not, or indis- 

 tinctly, striate, densely wooly-hairy; flower 

 heads in broad, round-topped end clusters; 

 flower-head bracts (at least lower ones) 

 hairy; shrubs to 6 feet high, often with big 

 sagebrush, e. Oreg., e. Wash., especially in 

 the Columbia River Basin area. 

 52. Twigs, leaves persistently, loosely white- 

 woolly-hairy. 



whitestem rubber rabbitbrush 

 (Chrysothamnus nauseosus albicaulis) . 

 52. Twigs, leaves closely greenish- or grayish- 

 woolly-hairy tall rubber rabbitbrush 



(Chrysothamnus nauseosus speciosus). 



Enlarged flower head 

 Disk flowers 



Flower-head bracts 



Rubber rabbitbrush 



F-296608B 



