1028 ' CICHORIACE.\E 



r 



ones at the base. Flowers yellow, seldom white or orange. Acheues cylindric, 

 not tapering towards the apex, truncate, 10-15-ribbed. Pappus of 1 or 2 series 

 of sordid or brownish, fragile capillary bristles. 



Involucres of the rather large heads irre^arly more or less imbricate. 



Stem yellowish or whitish hirsute below. 1. //. colunioianum. 



Stem glabrous or puberulent. 2. //. scabnusculum. 



Involucres of the rather small heads of an almost single series of principal bracts and 



small calyculate ones below. 

 Flowers yellow. 



Plant 4-10 dm. high, leafy. 



In^ olucres and peduncles densely hairy with long yellow hairs. 



3. H. alhertinutn. 

 Involucres blackish and glandular, without or with a few scattered yellow 



hairs. 

 Involucres 8-10 mm. high, with scattered yellow hairs. 4. H. griseum. 

 Involucres 6-8 imn. high, without yellow hairs on the involucre or peduncles. 



5. H. cynoglossoides. 



Plant low. 1-3 dm. high, with 1-3 stem-leaves and few heads. 



6. H. gracile. 



Flowers wlilte or ochroleucous. 7. i/. albiflorum. 



1. H. columbianum Rydb. Stem about 6 dm. high, terete, more or less 

 tinged with purple; lower leaves oblanceolate, 8^10 cm, long,^ light green and 

 somewhat glaucous beneath, usually more or less silky-hirsute, sinuately dentate, 

 acute; middle leaves lanceolate or ovate-lanceolate, with rounded or obtuse bases, 

 sessile, the uppermost much reduced and bract-like; inflorescence corjTnbose- 

 cymose; heads 2-6; involucres 10-12 mm. high; bracts lanceolate, dark, puberu- 

 lent when young, glabrous m age. Marshy ground: Mont. — Ida. — Wash. — B.C. 

 Siibmont. Jl~Au, 



2. H. scabriusculus Schwein. Stem erect, rather simple and strict, leafy; 

 lower leaves oblanceolate, the rest lanceolate, sessile, 3-8 cm. long, distantly 

 and acutely dentate, rather firm, paler beneath, scabrous-puberulent; heads 

 corymbose; involucres rounded-campanulate, 10-12 mm. high; bracts glabrous 

 or nearly so, usually blackish. H. macranihum Nutt. Open woods, hills, and 

 valleys -/Man. — Minn. — ^^^is. — Ore, — B.C. Plain — SiihmonL 



3. H. albertinum Farr. Stem 3-5 dm. high, villous with long white or 

 yellowish hairs from black papillae, or black-hairj^ above; leaves 5-12 cm. long, 

 the lower oblanceolate with winged petioles, the upper lance-linear to oblong- 

 lanceolate, densely long-hairy; heads paniculate; involucres 10-12 mm. high; 

 bracts long, narrowly lance-linear; pappus tawny. H. Scouleri A. Gray, not 

 Ilook. Hills and woods: Alta. — ^Utah— Ore. — Wash. SuhmonU — Mont. Jl-Au. 



4. H. grlseum Rydb. Stem 6-10 dm. high, covered with long w^hite or 

 yellowish hairs from evident papillae ' lower leaves linear-oblanceolate, the upper 

 oblong-linear or lance-linear, sessile, densely long-hairy; heads in a narrow panicle; 

 involucres about 1 cm. high; inner bracts linear-lanceolate, glandular, dark, and 

 at least when young beset with a few long hairs; pappus yellowish or tawny. 

 Hills, benchlandsj and open woods: Alta, — Wyo. — Utah — B.C. Submo7iL — 

 Mont Jl-Au. 



5. H. cynoglossoides Arvet-Touvet. Stem 3-5 dm. high, several-leaved, 

 hirsute throughout or glabrous above; lower leaves oblanceolate, rather sparingly 

 hirsute; upper leaves lanceolate, sessile, often glabrate; heads corymbose-panicu- 

 late; involucres campanulate, 8-10 mm. high, black; bracts proper narrowly 

 linear, densely glandular, but without long hairs; pappus tawny-white. Hills: 

 Mont. — ^T\^yo. — Wash. — B.C. SubmonL Je-Au. 



6. H. gracile Hook, Stem 1-3 dm. high, often scape-like, puberulent or 

 glabrate, sometimes ■v\'ith a few hispid hairs, especially in the inflorescence; basal 

 leaves obovate to oblong-spatulate, 2-7 cm. long, petioled, entire or repand- 

 denticulate, glabrous or nearly so; upper stem-leaves all small and bract-like; 

 heads usually few; involucres campanulate, 7-9 mm. high, usually densely black- 

 hirsute; pappus sordid or ta\\Tiy. Mountains: Alta. — N.M.— Calif, — ^Alaska. 

 S ub mont, — S abalp, Je-Au. 



7. H. albifiomm Hook. Stem 3^6 dm. high, more or less leafy or in de- 

 pauperate specimens scapiform, long-hirsute below, glabrate above; basal leaves 



