COMPOSURE (COMPOSITIO FAMILY.) 171 



♦- 1- H- -^ Dwarf or low species, alpine, entire-leaved, cespilose from a multi- 

 cipital caudcc, no Jine pubescence, monocephuluus : leaves few on the simple 

 stems, at least the radical broader than linear: rajs numerous and nut very 

 narrow: pappus simple or neurlij so. 



■*-*■ Involucre glabrous but jiruinose-glaudular, brownish j)urple : smooth and ijrecn. 



12. E. leiomerus, Oray. A spau \\\\^\\, sinootli ami very glabrous : 

 leaves bright green, niaiuly radical and spatulate, very obtuse, from 2 to 6 

 lines wide; cauline only 2 or 3 and smaller- involucre :\ lines high, close; 

 the bracts lanceolate and uot attenuate: rays about 40, linear, violet, :J or 4 

 lines long. — Synopt. Fl. i. 211. Aster (jlacialls iu Ijot. King Kxp. Moun- 

 taius of Colorado, Utah, aud Nevada. 



++ ++ Involucre hirsute or pubescent, greenish. 



13. E. ursinus, Eaton. A span or two high, looseli/ cespitose ' leaves 

 duller green, inosilj smooth aud glabrous, but their margins more or le.'^s hir- 

 sute-ciliate, spatulate to narroivlj oblanceolatc ; cauline ones lanceolate or linear 

 aud acute: involucre (3 lines high) and naked summit of flowering stem hirsute- 

 pubescent : rays 40 or 50, purple, narrowly linear, 3 lines long. — Hot. Kiug 

 Exp. 148. Alpine and subalpiue, mountains of Wyoming to S. Colorado, 

 Utah, and California. 



14. E. radicatUS, Hook. A span high or less, densely tufted : leaves all 

 spatuldte-linear or somewhat wider, broadest a line or two wide, hirsute or 

 hirsuteli/ ciliate, or sometimes almost naked, then glabrous ; no glandular rough- 

 ness: involucre more or less villous-pubescent, barelg 3 lines high: rags white 

 or purple, 2 or 3 lines long. — Alpine or subalpiue, from British America to 

 Wyoming, S. Colorado, and Utah. 



15. E. glandulosus, Porter. Cespitose from a stout caudex, a span to 

 a foot high, rigid, gntniilose-glanduUir or glandular-scabrous, aud with sparse 

 or liispid hairs, especially on the margins of the leaves: leaves thickish, 

 spatulate to linear-oblanceolate, 1 to 3 inches long : head 4 or 5 linrs high : 

 involucre glandular or viscid as well as pubescent: rays 40 or 50, violet or 

 purple, 4 ?o 6 lines long. — Fl. Colorado, 60. Mountains of Colorado. 



^_ H_ +. H_ ^_ None trulg alpine; with entire leaves, not liisjtidhj hirsute: invo- 

 lucre close, disposed to be imbricated and rigid: rags not verg numerous or 

 wanting. 



•*•*■ A span or tivo high : leaves only few and narrow on the simple or sjHjringlg 

 branched stems ; but radical ones ivith obovate or spatulate blade \ inch long : 

 rags IS to 30, pale violet or purple: akenes compressed , 2 to S-ncrvrd : pappus 

 nearlij simple. 



16. E. tener, Gray. Canescent with very fine pubescence: stems several 

 from a caudex, weak and ascending, bearing single or 2 or 3 heads : involucre 

 minutely canescent; its narrow and close bracts nne(|ual, som«nvhat in 2 «»r 3 

 ranks: rays 25 to 30. — Proc. Am. Acad. xvi. 91. High mountains of Utah 

 and California to those of Wind River, Montana. 



**•*-*■ A span to near a foot high, cespitose, silver ii-rnnesrrnt, with simple and 

 monocephalous stems: leaves from narrowlg spatulate to linear: rags 40 or 



