54G 



Rydberg: Species ii^om Western Uxited States 



rays 



lig 



ht 



lincar-lanccoIate, acute, black, slightly pubcrulcnt ; 

 blue, In age white, about 8 mm. long and 2-3 mm. vvide. 



In leaves and heads, thi^ resembles most E. simplex Greene, but 

 ha.s a different root-sy.stcm, is a much more glabrous plant and 

 lack altogether the long villous hairs on the involucre character- 

 istic of that species. On account of its root-system, it may be 

 associated with E. nrsinus and E. radicatus, but lacks the hirsute 

 pubescence of those species and has broader rays. The same char- 

 acters, together with the single head and broad leaves, separate it 

 from E. Eatonii, which also has somewhat the same habit. It is 

 an alpine species growing at an altitude of 3000 m. or more. 



WvoMiNG : Black Rock Creek, Teton Forest Reserve, August, 

 1897, Tweedy, s 43- 



Antennaria angustifolia 



Surculose -proliferous ; leaves of the stolons linear or lincar- 

 oblanceolatc, about 1.5 cm. long, finely tomentose on both sides - 

 stem-leaves narrowly linear, erect, the uppermost subulate ; heads 

 •(^w^ m a subcapitate cluster, 4-5 mm. high ; involucre campanu- 

 late, tomentose at the base; bracts of the fertile head linear- 

 oblong, acute, yellowish or brownish white. 



This is nearest related to A. pmvifolia and A. uiierophylla, from 



which it differs in the subcapitate heads and the very narrow 

 leaves. 



California: Yosemite Valley, 1S65, / Torrey (labeled A. 

 stenopJiylla?)- Hat Creek, J. S. Newberry (labeled A. Inzuloides -^ 

 both in the Torrey Herbarium). 



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^ J* 



