COMPOSITE. (COMPOSITE FAMILY.) 203 



fascicled in the axils, small, fleshy, linear-tlavjite, ghihrous or ghihrate : heads 

 scattered, pedunculate, fully ^ iucli long: pappus of coniparntivolv rigid capil- 

 lary bristles, a little surpassing the wool of the akeue. — Prom S. Wyoming 

 to Arizona, S. E. California, and K. Oregon. 



69. ARNICA, L. 



Perennial herbs; with erect stems, simple or l)ranching, opposite Icavefl, 

 and comparatively large long-pedunculate heads of yellow flowers. 



# Radical leaves cordate at base, on slender or sometimes wimjed petioles; cauline 

 all opposite, in I to 3 pairs, dentate or denticulate. 



1. A. COrdifolia, Hook. A foot or two, or when alpine a span or two 

 high, pubescent, or the stems hirsute and peduncles villous : lower cauline as 

 well as radical leaves loncj-petioled, deeply cordate, yet sometimes only ovate ; 

 upper cauline small, sessile : heads few, in smaller plants solitary : involucre 

 I inch long, pubescent or villous : rays commonly an inch long : akenes mure 

 or less hirsute. — From the mountains of Colorado to those of California and 

 British Columbia. 



Var. eradiata, Gray. An ambiguous form ; with smaller and rayless 

 heads, and oblong-ovate at most subcordate leaves. — Synopt. Fl. i. 381. 

 Montana and E. Oregon. 



2. A. latifolia, Bong. Minutely pubescent or commonly glabrous, with 

 smaller heads than the preceding: onli/ radical leaves cordate or subcordate and 

 petioled ; cauline 2 or 3 pairs, equal, ovate or oval, nsuallij sharjili/ dcntato, clostlij 

 sessile hj a broad base, or lowest with contracted base: a/.rnrs commonl)/ (jla- 

 brate or glabrous. — Pine woods, mountains of Colorado and Utah to Oregon, 

 British Columbia, and Alaska. 



* * No cordate leaves ; radical leaves petioled, taperinrj or abrupt at base. 



1- Lenfi/ to the top: caidine leaves seldom less than 4 pairs, and the upper not 



conspicuousl 1/ diin in ished. 



3. A. ChamiSSOnis, Less. From tomentose or villous-puhescent to nearbj 

 fjlabrous: leaves oblong or oblong-lanceolate, denticulate or dentate, acute or ob- 

 tuse ; lowest tapering into a margined petiole, upper broad at base and somewhat 

 clasping: akenes hirsute-pubescent. — Including A. mollis, Hook.; also A. lati- 

 folia in part, of the Western Reports. Mountains of Colorado and L'tah to 

 those of California and far northward. 



4. A. longifolia, Eaton. Mam/stemmed in a tuft, minuleli/ puf>rrulent : 

 cauline leaves elongated-lanceolate, tapering to both ends, entire or denticulate, 

 somewhat nervose, 3 to 6 inches long, lourr irith narrowed bases rnnnatr-ragi- 

 note: heads corymbosely disposed, short-pedunded : akenes minutely glandu- 

 lar, not hairy. — Bot. King Exp. 186. Wasatch Mountains and westward. 



5. A. foliosa, Nutt. Tomentose-ptd)escent, .<ifrict: leaves lanceolate, denticu- 

 late, nervose ; upper parti n clasping bif narroivish base, lower with tapering hisra 

 connate : heads short-peduncled, rarely solitary : akenes hirsute-pubescent or 

 glabrate. — .^. Chamissonis of the Western Kejiorts, in j.art. From tho Sa.** 

 katchewan to Oregon and southward along the mountains to N. California 

 and Colorado. 



