102G CICHORIACEAE 



of the narrower base, oblanceolate, runcinate-tootlied; involucres turbinate-cam- 



EamilatCj aboTit 1 cm. high, more or less glandular-hairy, with j^Uowish hairs; 

 racts linear-lanceolate, acuminate; calyculum about one-third as long. Valleys: 

 Man. — Neb. — Colo. — Alta. Siibmont. — Mont. Je-Au. 



6. C, runcinata (James) T. & G. Stem scapiform, 3-5 dm. high, slightly 



Eubescent or glabrous ;^ leaves mostly basal, oblanceolate or spatulate, tapering 

 elow, dentate or entire or nmcinate, rather densely glandular-hirsute; invo- 

 lucres turbinate, glandular-hirsute, with 3^ellowish hairs; bracts narrowly lance- 

 linear. Valleys: Sask. — N.D. — Colo. — Alta. Je-Au, 



7. C. platyphylla Greene. Stem seape-like, 3-6 dm. high, glandidar-hirsute 

 in the inflorescence, otherwise glabrous; leaves basal, hirsute, oblanceolate, 

 dentate or somewhat runcinate, IQ-lo cm. long; involucres broadly turbinate, 

 12-15 mm. high, densely glandular-hirsute; bracts lance-linear. C. runcinata 

 hispidulosa Howell. (?) C subcarnosa Greene. Meadows and bogs: Mont. — 

 Wyo. — Utah — Neb. — Ore. Plain — Sub7nont, Je-Au. 



8. C. riparia A. Nels. Stems 2-4 dm. high, subscapose, minutely and 

 sparsely pubescent below, glandular-hirsute in the inflorescence; leaves mostly 

 basal, usually rounded at the apex, coarsely and irregularly dentate or entire, 

 somewhat runcinate towards the base, 10-18 cm. long, sparmgly hirsute on the 

 veins; involucres broadly turbinate, 12-15 mm. high, densely glandular, with 

 dark hairs; principal bracts linear. (?) C aculeolaia Greene. River-banks: Neb. 

 — Colo. — Utah — Wyo. Plain — Submont. Jl-Au. 



9. C. denticulata Rydb. Stem scape-like; leaves basal, obovate or more 

 rarely obovate-oblanceolate, glabrous or nearly so, obtuse, less than 1 dm. long, 

 denticulate or with a few lobes towards the base. Mountains: Wyo. — Colo. — 

 Utah. Submo7it. — MonL Jl-Au. 



10. C. alpicola (Rydb.) A. Nels. Stem scape-like, 1-2 dm. high, glandular- 

 hirsute above; leaves obovate or oblanceolate, sessile or nearly so, entire or den- 

 tate, glabrous, 3-6 cm. long; involucres 12-14 mm. high, glandular-hirsute; prin- 

 cipal bracts lance-linear. High mountains: Alont. — Colo. Mont. — Alp, Au. 



11. C. acuminata Xutt. Stem 4-8 dm. high, 1-3-leaved; basal leaves 

 slender-petioled; blades 1-2 dm. long, broadly lanceolate in outline, long-acumin- 

 ate at the apex, grayish canescent; lobes saUent or reflexed; stem-leaves subsessile, 

 the upper ones linear and entire; heads corymbose; involucres cylindric, glabrous, 

 about 1 cm. high, 4-5 mm. broad; principal bracts 5-7. Hillsides: Alta. — Colo. 

 —Calif.— B.C. Submont. Je-^Au. 



12. C. sesilifolia Rydb. Stem 4-6 dm. high, slender, canescent-tomentose 

 or glabrous above; basal leaves long-petioled; blades 1-2 dm. long, deeply twice- 

 pinnatifid, with linear-filiform divisions, canescent, caudate-acuminate; stem- 

 leaves subsessUe, less divided, the uppermost entire and linear- filiform; involucre 

 about 1 cm. high; bracts proper 5-7, linear, yellowish green. Rocky hillsides: 

 Ida. SubmonL Je. 



13. C. intermedia A. Gray, Stem 3-5 dm. high, canescent-tomentulose; 

 basal leaves broadly lanceolate, acuminate, canescent-tomentulose, usually 

 divided only halfway to the midrib into lanceolate acuminate lobes, which are 

 usually directed downward; stem-leaves subsessile, the uppermost linear and 

 entire; involucres subcylindric, tomentose, 12-14 mm. high; bracts proper about 

 7, linear-lanceolate, more or less scarious-margined. Hillsides: Sask.— Colo.— 

 Calif. — B.C. Submont, My-Au. 



14. C. angustata Rydb. Stems 3-7 dm. high; basal leaves and lower stem- 

 leaves petioled, canescent-puberulent, runcinate; main body narrowly Knear- 

 lanceolate, acuminate; upper stem-leaves entire and sessile; involucre cylindric, 

 about 1 cm. high and 5 mm. broad; bracts 5-7, linear-lanceolate, acute, canes- 

 cent. Mountains: Mont. — Colo. — Ore. — B.C. Submont, Je-Au. 



15. C. gracilis (D. C. Eat.) Rydb. Stem slender, 2-5 dm. high, canescent- 

 tomentulose; basal leaves petioled, the cauline ones sessile, all except the upper- 

 most pmnatifid, with narrowly linear di\isions; involucres tomentulose, cylindric, 

 about 1 cm. high; bracts proper. 7-14, narrowlv linear-lanceolate, often with a 



