COMPOSIT^E. (COMPOSITE FAMILY.) 18? 



imbricated in about 3 series, oblong-lanceolate, acutish : disk yellow. — Eastern 



Rocky Mountains and adjacent plains, Iruni Wyoming to Colorado. 



* # * Involucre looser and the bracts disposed to be more taper-pointed, or folia- 



ceous : disk i/ellow or i/ellowish. 



H- Stems smooth or somewhat scabi-ous: leaves mostlij lanceolate or uarrowtr: 



invo/ucral bracts I'nuar-subulate, loose or soon squarrosc-spreadimi. 



6. H. grosse-serratUS, Martens. Stem ven/ smooth and qlnbrous, mm- 

 monli/ (jlaucous, 6 to 10 ieet high, bearing numerous rather cymosely disposed 

 and short-peduncled heads : leaves slendfr-petioled, thinnish, oblong lanceolate 

 or narrower, or some of the cauline almost deltoid lanceolate, gradually acu- 

 minate, sharplij serrate, or upper merely denticulate, slightly scabrous above, 

 whitish and so/i-puberulent beneath; larger cauline commonly 8 to 10 inches and 

 the petiole an inch or two long: deep yellow oblong rays over an inch long. 

 — Dry jdains, from Texas to the Dakotas and as far east as Ohio. 



7. H. Maximiliani, Schrader. Hispiduhus-scabrous : stem stout, 2 or 3 

 (and even 10 to 12) feet high, below mostlj/ rowjh-hispid : leaves almost ail alter- 

 nate, thickish, becoming rigid, veri/ scabrous above, lanceolate, acute or acuminate 

 at both ends, mostlif subsessile, all entire or sparingly/ denticulate : involucre of 

 more rigid bracts : rays numerous, often inch and a half long, golden yel- 

 low. — Prairies and plains west of the Mississippi, and from the Saskatchewan 

 to Texas. 



8. H. Nuttallii, Torr. & Gray. Stem slender, 2 to 1 feet high, commonly 

 simple, smooth and glabrous: leaves lanceolate or the upi)er linear, 3 to G inches 

 long, 3 to 9 lines wide, sliort-pefioled or subsessile, serrulate or entire: bracts of 

 the involucre naked or somewhat hirsute at base : paleae of the papj>us long 

 and narrow. — Fl. ii. 324. In wet soil, W. Wyoming and Utah to Oregon, 

 Washington, and British Columbia. 



■*- -t- Stems pubescent or hirsute: leaves ovate or subcordate : involucral bracts 

 lanceolate, loose, hirsute-ciliate. 



9. H. tuberosus, L. Stem 5 to lO feet high, branching at summit: 

 leaves mostly alternate on tlie branches, acuminate, dull green, minutely pu- 

 bescent and occasionally cinereous beneath, soon scabrous aliove: brarts of 

 the involucre attenuate-acuminate : rays often inch and a half long. 12 to 20 : 

 bracts of the receptacle hirsute-pubescent on the back : akenes more or less 

 pubescent at summit and margins, mostly long and slender. — The "Jeru.«ia- 

 lem Artichoke," widely cultivated for its fleshy tul)ers, and found under various 

 forms, especially in the E. United States. An indigenous form coming within 

 our range is 



Var. subcanescens, Gray. Mostly dwarf, about 2 feet high, compara- 

 tively small-leaved, roiigh-hispidulous or scabrous, but the lower face of the 

 leaves whitish with soft and fine pubescence. — Synopt. Fl. i. 280. Plains 

 of Minnesota, Dakotas, etc. 



40. HELIANTHELLA, Torr. & Gray. 



Leafy-steiumed : leaves lanceolate to ovate, with tajioring base, opposite or 

 alternate: rays broad, yellow: disk yellow or purplisli-l»rown : akcues flat, 

 from cuneate-obovate and emarginate to slightly obcordate. 



