OF ARTS AND SCIENCES. 89 



E. ARGENTATus, Graj, Proc. Am. Acad. 1. c. E. ccespitosus, 

 Eaton, Bot. King, pro parte. — Arid interior region of S. Utah and 

 Nevada. 



6. Species montano-occidentales, humiles e caudice multicipiti ligne- 

 scente vel incrassato ; foliis angustis integerrimis {E. composilo ex- 

 cepto) ; involucro hand lanato. 



* Folia filiformia, ima nunc spathulato-linearia nee ultralineam lata. 



-t- Corolla disci tubo villoso-hirsuto : achenia 2-4-nervata : involu- 

 crum e bracteis subincequalibus : caules saepe ramosi, capitula spe- 

 ciosa saepius albo-ligulata longius pedunculata gerentes : pappus 

 fere simplex. 



E. STENOPHYLLus, Graj in Pacif. R. Rep. iv. 42. — N. W. Texas, 

 Bigelow. 



E. Utahensis. E. stenophyllus, var. ? teirapleurus, Gray, Proc. 

 Am. Acad. viii. 650. — Arid region of S. Utah, Mrs. Thompson, 

 Capt. Bishop, Parry, Palmer. 



•(— -i- CoroUae disci fere glabrae : achenia binervata. 



++ Pappus simplex : caules superne saepius ramosi foliati : ligulae 

 30—80, violaceee vel albae. 



E. FiLiFOLius, Nutt. ; Torr. & Gray, Fl. ii. 177. Chrysopsis 

 canescens, DC. Prodr. v. 328. — British Columbia to California, in 

 the dry interior. 



+-•• ■•-+ Pappus satis duplex, serie exteriore setulosa vel squamellata 

 brevi manifesta : caules floridi saepius simplices, superne pedunculi- 

 formes monocephali : ligulae nunc ochroleucae, saltern flavae ! 



E. PEUCEPHYLLrs. Facie et involucro subimbricato E. jiUfolium 

 simulans, pube cinerea adpressa magis strigillosa, demum glabratus ; 

 foliis filiformibus ; ligulis 30-40 (lin. 2-3 longis) nunc pallide caeruleis 

 nunc ochroleucis vel luteis ; pappo exteriore squamellato. E. ochro- 

 leucus, Auct. pro parte, Gray, Bot. Calif, i. 328, etc. Diplopappus 

 filifolius, Hook. Fl. ii. 21, ex char. — British Columbia and Idaho to 

 the Sierra Nevada, California. 



E. OCHROLEUCUS, Nutt. Magis hirsutus, nunc glabratus ; foliis e 

 lineari-filiformibus ad lineari-spathulata inferne hirsuto-ciliatis; capitulo 

 majore ; involucri bracteis £equilongis ; ligulis plus 40 (lin. 3-5 longis) 

 nunc albidis nunc luteis; pappo exteriore fere setuloso. — Idaho and 

 E. Oregon. 



