COMPOSIT.E. (COMPOSITE FAMILY.) 147 



petiole or tapering base); cauliue lanceulate, or small uppermost liuear: 

 heads solitarij or 2 or Z in axils, smaller than in foregoing : involucral brarti 

 narrowlij oblowj to linear-lanceolate, some loose outer ones usually ecjualling the 

 disk and more foliaceous: raijs hriyht i/elloir, half-inch lou<i: immature akeues 

 oblong. — Gray, Proc. Am. Acad. xvi. 79. Mountain meadows, Wyoming, 

 and Montana. 



•^ -t- ■*- Heads conspicuousl ij radiate, smaller : rai/s J to barely 4 inch luntf: 

 akenes silkij pubesce?tt or villous. 

 •*■* Mostli/ simple stems with a tujl of radical leaves : leaves coriaceous, entire or 

 spinulose-serrate, the caidine diminished upaards : rai/s 20 to 50: pappus 

 pale, rather soft and Jine. 



5. A. uniflorus, Torr. Sc Gray. Stems a span to barely a foot high, 

 ascending or erect, sometimes 5 to 6-leaved, sometimes rath r scapiform or upj>tr 

 leaves reduced and bract-like, bearing a solitarij head, rarely one or two from 

 4ower axils : leaves lanceolate or sometimes broader ; radical 2 or 3 inches 

 long and usually petioled : involucre commonly i inch high and tlie linear or 

 oblong-linear bracts all of same length, rather loose, outer all fuliaceous. — .1, uni- 

 for us & A. inuloides, Torr. & Gray, Fl. ii. 241. From the Saskatciiewan to 

 Montana, Utah, and Colorado. 



6. A. lanceolatUS, Torr. & Gray. Habit of the preceding: stems gen- 

 erallg more leafy and bearing ^ to 15 heads; these when few subcorvmbo.'se, 

 when more numerous racemosely or paniculately disposed : involucre in the 

 type fully ^ inch high ; its bracts rather closely imbricated in 3 or 4 uneiptal 

 series, lanceolate, acutish, with short green tips and wJiitish coriaceous ba.«e ; 

 outer successively shorter, occasionally some of them longer and more herba- 

 ceous. — Eaton, Bot. King Exp. 160. From the Saskatchewan to British 

 Columbia and N. Nevada. 



Var. Vaseyi, Parry. Heads a third or quite half smaller, dispo.sed to 

 be racemose and involucre closer. — Saskatchewan to Wyoming, Utah, and 

 Colorado. 



*♦ ++ Very dwarf from a multicipifal caudex, leafy up to the small heads: leaves 

 all narrow and entire: rays 1 to \Q: pappus scanty, somewhat fulvous. 



7. A. multicaulis, Gray. Very dwarf, tufted, tomentulose. but early 

 glabrate and smooth : stems 1 to 3 inches high from a ligneous caudex, simple 

 or forked, bearing 3 or 4 leaves and few heads: loaves narrowly linear, or the 

 lowest obscurely spatulate, an inch long: bracts of the involucre large and 

 rather few (9 to 14), from ovate to oblong-lanceolate, cuspidate-acuminate, 

 marked with a green spot below the slender cusp, or the outermost with a 

 larger foliaceous tip. — Am. Xat. viii. 213. On rocks, mountains of X. W. 

 Wyoming. 



•+-«■•«-(■++ Branching and leafy : leaves not rigid, dentate or pinnafifd, the teeth 

 and tips bristle-tipped: rays conspicuous, \o to 30: papjius rather rigid, its 

 bristles very unerptal in size and strength. 



8. A. rubiginosus, Torr. & Gray. One to three feet high, viscid-glan- 

 dular and pubescent: leaves lanceolate or narrowly oblong, incisely pinnaffd or 

 dentate with salient narrow teeth: heads somewhat cymosely paniculate, 5 or 6 

 Knes high, usually naked pedunculate : bracts of the involucre linear-subulato, 



