546 Rydberg : Species from Western United States 



linear-lanceolate, acute, black, slightly puberulent ; rays light 

 blue, in age white, about 8 mm. long and 2—3 mm. wide. 



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

 has a different root-system, 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. iirsiinis 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. 



Wyoming : Black Rock Creek, Teton Forest Reserve, August,. 

 1897, Tzvccdy, S43- 



Antennaria angustifolia 



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

 oblanceolate, about 1.5 cm. long, finely tomentose on both sides; 

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

 {e\w in 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. pajvifolia and A. micropJiylla, from 

 which it differs in the subcapitate heads and the very narrow 

 leaves. 



California: Yosemite Valley, 1865, /. Torrey (labeled A. 

 stoiopliylla ? ) ; Hat Creek, J. S. Newberry (labeled A. luzidoides ; 

 both in the Torrey Herbarium). 



