904 CARDUACEAE 



brate; stem-leaves very few, linear; heads solitary; involucres about 5 mm. high 

 and 10 mm. wide; bracts lance-linear, acute, hirsute; ligules white, 4-6 mm. long. 

 Mountains and hills: Sask. Wyo. B.C. Mont. Alp. My-Je. 



31. E. vetensis Rydb. Stem 3-8 cm. high, hirsute, few-leaved; leaves 

 linear or linear-oblanceolate, hirsute, 2-4 cm. long; heads solitary; involucres 

 4-5 mm. high, about 10 mm. broad; bracts linear, acuminate, hirsute; ligules 

 purple, 8-10 mm. long. E. radicatus Gray, not Hook. High mountains: Mont. 

 Colo. Utah. Submont. Mont. Je-Au. 



32. E. nanus Nutt. Stem 5-10 cm. high, hirsute; leaves crowded, densely 

 hirsute, linear-oblanceolate, 3-5 cm. long; heads solitary; involucres about 5 mm. 

 high and 10 mm. broad, hirsute; bracts linear; ligules 20-50, purple, violet or 

 white, about 6 mm. long. E. poliospermus A. Gray. E. inamoenus A. Nels. 

 E. wyomingensis A. Nels. Hills: Mont. Colo. Utah. Submont. Je-Au. 



33. E. nematophyllus Rydb. Stems several, strigose, about 5 cm. high, 

 few-leaved; leaves linear-filiform, 2-4 cm. long, less than 1 mm. wide, strigose; 

 heads solitary; involucres 4r-5 mm. high, 8-10 mm. broad; bracts linear, acute, 

 hirsute-strigose; ligules pinkish or white, 4-5 mm. long; outer pappus of short 

 bristles. E. Eatonii Coult. & Nels., in part, not A. Gray. Rocky hills: Colo. 

 Wyo. Submont. My-Jl. 



34. E. Bloomeri A. Gray. Stem scapiform, 5-15 cm. high, finely strigose; 

 basal leaves numerous, 2-10 cm. long, 2-3 mm. wide, cinereous-strigose; involucres 

 7-8 mm. high, 10-12 mm. broad, softly villous; bracts linear; ligules wanting. 

 Stony ground: Ore. Ida. Nev. Calif. My-Je. 



35. E. pumilus Nutt. Perennial, with a cespitose short caudex; stem 

 erect, 1-3 dm. high, hirsute, leafy; lower leaves narrowly oblanceolate, 2-10 cm. 

 long, hirsute, the upper linear; heads several; involucres 7-8 mm. high, 12-15 

 mm. broad; bracts narrowly linear, acute, hirsute; ligules 50-80, white, 7-10 

 mm. long, at length reflexed. Dry plains: Sask. N.D. Kans. Utah B.C. 

 Plain Submont. My-Jl. 



36. E. Brandegei A. Gray. Stem 2-3 dm. high, sparingly hispidulous-hir- 

 sute; basal leaves linear-spatulate, sparingly hirsute; stem-leaves linear, the 

 upper minute; bracts of the involucre linear, short, almost glabrous; ligules 30 

 or more; inner pappus rather scanty. Adobe plains: sw Utah. Son. 



37. E. concinnus T. & G. Perennial, with a taproot and short cespitose 

 caudex; stem erect, 1-3 dm. high, hirsute with long white hairs, lower leaves 

 linear-oblanceolate, the upper linear, densely hirsute; heads corymbose; involucres 

 6-7 mm. high, 10-15 mm. broad; bracts narrowly linear, acute, densely hirsute; 

 ligules 7-9 mm. long. E. hispidissimum Piper. Plains and hills: Mont. N.M. 

 Calif. B.C. Plain Submont. 



38. E. condensatus (D. C. Eat.) Greene. Perennial, with a cespitose cau- 

 dex; stem usually less than 1 dm. high and monocephalous, hirsute; leaves nar- 

 rowly spatulate, hirsute, 2-3 cm. long; involucres 5-6 mm. high, about 1 cm. 

 broad; bracts linear, acute, hirsute; ligules white, rarely pinkish, 6 mm. long; 

 pappus double, the outer of broad scales. E. concinnus condensatus D. C. Eat. 

 Dry hills: Mont. Ariz. Nev. My-Jl. 



39. E. aphanactis (A. Gray) Greene. Perennial, with a cespitose caudex; 

 stem 1-2 dm. high, branched, short-hirsute; lower leaves spatulate, 3-5 cm. long, 

 hirsute, the upper linear-oblanceolate; heads several, corymbose; involucres 

 about 5 mm. high and 1 cm. broad, hirsute; bracts linear, acute, hirsute; rays 

 wanting; pappus double, the outer squamellate. Arid regions: Utah Nev. 

 Calif. Son. My-Jl. 



40. E. decumbens Nutt. Perennial, with a taproot and short caudex; 

 stems several, 15-30 cm. high, hirsute; basal leaves linear-oblanceolate, 6-10 cm. 

 long, 3-nerved, ^ hirsute as well as glandular-scabrous; stem-leaves narrowly 

 linear; heads solitary or few; involucres 6V? mm. high, 12-15 mm. broad, hirsute; 

 bracts linear, in about 2 series; ligules 30-40, purplish or white, 7-8 mm. long. 

 Plains and hills: Mont. Wyo. Calif. Wash. Plain Submont. Je-Au. 



