THISTLE FAMILY 947 



11. C. Douglasii (Hook.) H. & A. Stem 2-5 dm. high, sparingly floccose, 

 in age glabrate, glandular-puberulent in the inflorescence; leaves bipinnatifid 

 with numerous short, crowded, obtuse lobes, more or less floccose; heads panicu- 

 late; involucres 10-13 mm. high, 15-20 mm. broad; bracts linear, obtuse, glandu- 

 lar-puberulent; pappus-squamellae oblong or linear, obtuse, about 5 mm. long. 

 Sandy and rocky places: Alta. N.M. Calif. B.C. Plain Mont. Je-JL 



12. C. pedicularia Greene. Stem leafy, 1-2 dm. high, decumbent; leaves 

 twice pinnatifid, with short obtuse lobes, sparingly tomentulose when young; 

 peduncles 1-2 cm. long; involucres about 15 mm. high and broad; bracts tomen- 

 tulose, scarcely at all glandular, acutish; pappus-squamellae linear-oblong to 

 linear, obtuse. High mountains: Colo. Alp. Jl. 



13. C. minuscula Greene. Scape 1-3 cm. high; leaves crowded, 2-3 cm. 

 long, lanceolate in outline, with short entire or toothed divisions, nearly gla- 

 brous; involucres 1 cm. high and broad; bracts linear, acute or the inner acum- 

 inate, finely glandular-puberulent; corollas white, 6 mm. long; squamellae oblong, 



.obtuse, 3 mm. long. Mountain tops: Ida. Alp. 



14. C. alpina (A. Gray) M. E. Jones. Stem 1 dm. high or less, subscapose; 

 leaves mostly basal, twice pinnately dissected, with short obtuse lobes, somewhat 

 tomentose when young; peduncles 2-7 cm. long, glandular-puberulent; involucres 

 8-12 mm. high, 10-15 mm. broad; bracts linear, obtuse, usually purple; corollas 

 flesh-colored, all alike; pappus-squamellae linear-oblanceolate or hnear-spatu- 

 late, obtuse, 4-5 mm. long. C. rubella Greene. High mountains Colo. Calif. 



-Ore. Mont. Alp. Jl-Au. 



15. C. Evermannii Greene. Scape 1-3 cm. long, floccose; leaves 1-2 cm. 

 long, 3-5-toothed or 3-5-lobed above the middle, loosely floccose; involucres 

 6-8 mm. high and broad, puberulent; bracts linear-spatulate, rounded at the 

 apex; corollas flesh-colored or white, 5 mm. long; squamellae 8, unequal, oblong, 

 obtuse, the longer 4-5 mm. long. Mountain tops: Ida. Alp. 



102. ERIOPHYLLUM Lag. WOOLLY YELLOW DAISY. 



Annual or perennial (in ours with a cespitose caudex), floccose or tomentose 

 herbs or low shrubs. Leaves alternate, entire or pinnately lobed or dissected. 

 Heads radiate, rarely discoid. Involucre hemispheric; bracts in a single series 

 or in 2 equal series, somewhat overlapping, concave or somewhat boat-shaped, 

 partly enveloping the marginal achenes; receptacle usually more or less convex, 

 naked. Ray-flowers pistillate and fertile; ligules yellow, oblong. Disk-flowers 

 usually numerous, hermaphrodite and fertile. Achenes 4-5-angled, narrowly 

 elongate-obpyramidal, glabrous, hirsute, or glandular. Pappus of 4-12 hyaline, 

 often erose squamellae, or rarely wanting. 



Leaves entire or merely the earlier ones toothed at the apex. 



Achenes glabrous or nearly so. 1. E. pedunculatum. 

 Achenes decidedly pubescent or glandular. 



Leaves narrowly linear-oblanceolate or linear. 2. E. gracile. 



Leaves oblanceolate or obovate. 3. E. integri folium. 

 Leaves more or less lobed or dissected. 

 Achenes glabrous. 



Bracts acuminate, surpassing the disk. 4. E. multiflorum. 



Bracts abruptly acute, not surpassing the disk. 5. E. lanatum. 



Achenes hairy. 6. E. Watsoni. 



1. E. pedunculatum Heller. Stems several, simple, 3-5 dm. high, reddish 

 below, sparingly tomentose; leaves oblong-lanceolate, subsessile, 3-5 cm. long, 

 1 cm. wide, entire, acute, floccose on both sides; peduncles 5-15 cm. long; invo- 

 lucres about 1 cm. high and broad, lanate; bracts 8, lanceolate, short-acuminate; 

 ligules oblong, orange, about 1 cm. long. Dry open places: Ida. Plain. Jl. 



2. E. gracile (H. & A.) A. Gray. Stems several, 2-3 dm. high; leaves nar- 

 rowly linear or narrowly linear-oblanceolate, 3-5 cm. long, loosely floccose; invo- 

 lucres 7-8 mm. high and about as broad; bracts about 10, oblong, acutish; rays 

 7-8 mm. long; achenes densely glandular-granuliferous. Gravelly places: Wash. 

 Ida. Plain Submont. Je Jl. 



