1026 CICHORIACEAE 



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

 panulate, about 1 cm. high, more or less glandular-hair}^, with yellowish hairs; 

 bracts linear-lanceolate, acmninate; calyculum about one-third as long. Valleys: 

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



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

 pubescent or glabrous; leaves mostly basal, oblanceolate or spatulate, tapering 

 below, dentate or entire or runcinate, rather densely glandular-hirsute; invo- 

 lucres turbinate, glandidar-hirsute, with yellowish hairs; bracts narrowly lance- 

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



7. C. platyphylla Greene. Stem scape-like, 3-6 dm. high, glandular-hirsute 

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

 dentate or somewhat runcinate, 10-15 cm. long; involucres broadly txirbinate, 

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

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

 Wyo. — Utah — Neb.— Ore. Plain — Submont. 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 roimded at the apex, coarsely and irregularly dentate or entire, 

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

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

 dark hairs; principal bracts linear. (?) C. aculeolata 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. Submont. — Mont. 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: Mont. — Colo. Mont.- — Alp. Au. 



11. C. acuminata Nutt. 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 salient or reflexed ; stem-leaves subsessile, 

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

 about 1 cm. high, 4r-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 subsessile, less divided, the uppermost entire and linear-filiform; involucre 

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

 Ida. Submont. 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 u])j)crmost 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, cancscent-puberulent, runcinate; main body narrowly linear- 

 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 pinnatifid, with narrowly linear divisions; involucres tomentulose, cyhndric, 

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



