Aster. C'OMPOSIT.E. 191 



nu:- 



-> A. adscendens, Lixdl. a span to a foot or two hiijh, rather rigid, from nearlv '4a>jr. ., , 

 to stngulose-hirsutulous : steii,> a.-cending or erect from oreepir,^: ruutstock^, "commonly 

 brancliuig, bearing few or rather numerous loosely paniculate or subcorMiil,osf heads (tlio^e 

 4 or 5 lii.e.. high) : leaves of firm and thicki>h texture (veins ob-cure), linear to spatulate- 

 lanceulate, entire, with margins commonly hispidulmis-ciliate or srabr.ms : bracts of the 

 hemisi.lierical involucre oblong-linear or obscurelv spatulate, moderatelv unequal and in 

 • comparatively few ranks : the green tij.s looser, either glabrous, puberulent, "or ciliolate ; inner 

 often mucronulate: rays 3 or 4 lines Ion-, violet or purple. — DC. Prudr. v. 2.il, iHook. 

 Fl. ii 8; Torr. & Gray, Fl. ii. 111. A. daimlatus, var. rlllatlfoHus, Xutt. Trans. Am. PhQ. 

 !>oc vii. 29.3. .4. fakatus, Eaton in Bot. King Exp. 140, mainlv. A. mulliflorus, var. rom- 

 iiiutatus, Gray, PI. AVright. ii. 76, a lai-e form. —Plains and moist banks, Saslc^itchewan and 

 .Alontana, to Colorado, Xew .Mexico, X. Arizona, aud \X. Nevada, ascending the mountains 

 to 10,0nij feet ; first coll. in Brit. America by DnnnnmiuJ. 



Var. denudatUS, Torr. & Gkat, 1. c. X low or slender form, smoother, less leafy, 

 , or rameal leaM-s much reduced in size, and smaller heads and ravs. — J. denudatus {& A. 

 ramulo.^us, in part, as to specimens), Xutt. 1. c. 2'J2. A. A' /fta////, ' Torr. & Gray, 1. c. 126 ; 

 Eaton in Bot. King F.x^p., 1. c. — Plains of Utah to S. Idaho ; first coll. by .Vj««//. 



Var. Yosemitanus. Greener, le,,> rigid, v.-ith comparatively large heads and 

 looser involucre. — .^ierra Xevada, from Summit to the Yosemite ^'alle\-". 

 A. Hallii, Gray. .Stem strict, a foot or two high, leafy to the top, bearin"- numerous short 

 racemosely disposed and ascending flowering branches : these minutely pubescent : leaves 

 (1 or 2 inches long, barely 2 lines wide) entire, scabrous-eUiohite, otherwise smooth and 

 glabrous, neither dilated nor contracted at base : heads small (.3 lines hisl.) and numerous, 

 somewhat racemosely paniculate and crowded : involucre campanulate, glabrous ; the bracts 

 subsjiatulate-linear with oval or oblong ki een tips rather close and erect : rays 2 or 3 lines 

 long, white or M-hiti>h. — Proc. Am. Acad. viii. 3S8, name only. — Dry ground, Oregon, 

 E. Hall (distrib. no. 243), Lohb (289), II,i,d,:r,oii. Perhaps this is A.' brarJcolatiis, Xutt. 

 Trans. Am. Phil. S'h. vii. 293, no specimens of which seem to have been preserved, and 

 which is compared with .1. campestris, but is said to have a smooth involucre. 



b. Involucre of the middle-sized heads more or less imbricated but looser; the bracts all narrow 

 (linear or approaching subulate), thinnish, from moderately to liavdly unequal, loosely erect, aU 

 acute or acutish, with not at all dilated tips, nor are the outermost normally eulaigL-d-foliacc-ous : 

 leaves mostly entire. 



1. Low, or only a foot or two high, chiefly of the mountains and high northward, mostly glabrous 

 or a little pubescent. 



A. AndinUS, Xm. Dwarf, with decumbent stems 2 or 3 inches long from filiform creep- 

 ing rootstocks, bearing a solitary comparatively large head; leaves only half-inch long; 

 radical and lower caulinc spatulate ; cauline (2 or 3) linear-lanceolate : involucre hemispheri- 



' cal, 4 lines liigli ,■ its linear acutish bracts of almost equal length, nearly glabrous: rays 

 violet, 4 lines laig (35 to 40): style-tips short-lanceolate, acute. — Trau^. Am. Phil. Soc. 

 vii. 290 : Torr. & Gray, Fl. ii. 1 54. — Piocky Mountains at Thomberg's Ridge, AVyoming, 

 lat. 42°, near perpetual snow, X^ittall. X'ot since found : perhaps a high alpine state of A. 

 Fremojiti. 



A. spathulatus, Lixdl. Low, a span or two high, with ascending stems sparingly 

 branched above and bearing 3 to 5 corymbosely disposed pedunculate rather large (half-inch 

 high) heads : leaves (1 J to 3 inches long) linear-spatulate or upper linear-lanceolate with half- 

 clasping base, and radical broader : involucre hemispherical ; its linear bracts acutish, nearly 

 equal: rays rather short, 3 lines long. — DC. Prodr. v. 231, & Hook. Fl. ii. 8 : Torr. & Gray, 

 1. c. — Subarctic America, between Bear Lake and Fort Franklin, on the Mackenzie Eiver, 

 Richardson. Approaches the next ; but not matched. 

 ' A. Premonti. A span to a foot (rarely 2 feet) high, glabrous or some minute soft pubes- 

 cence along the upper part of the slender erect stem : leaves thinner and with margins either 

 quite naked and smooth or obscurely ciliolate-scabrous ; radical and lowest cauline oblong or 

 oblanceolate, or somewhat obovate (inch or two long), and tapering into a slender mar- 

 gined petiole : cauline from oblong-lanceolate to linear, commonly half-clasping at base ; 

 heads solitary in the smaller specimens, several in the larger, one third to half an inch high 

 (and the numerous violet rays 4 lines long), somewhat naked-peduncled : bracts of the invo- 

 lucre narrowly linear, obtuse or acutish, or the inner acute, some of the outer shorter, all 



