908 CARDUACEAE 



70. E. ramosus (Walt.) B.S.P. Annual; stem erect, 3-6 dm. high, corym- 

 bosely branched, strigose; basal leaves petioled, 5-10 cm. long, spatulate or ob- 

 lanceolate, often sparingly serrulate; stem-leaves linear, or nearly so; heads 

 numerous; involucres hirsute, 3-4 mm. high, 6^-8 mm. broad; bracts linear, acute; 

 ligules white, numerous, about 5 mm. long; inner pappus of few bristles or in 

 the rays lacking. E. strigosus Muhl. Dry places: N.S. Fla. Calif. B.C.; 

 the more hairy western form west of Minn, and Kans. Je-S. 



71. E. Bellidiastrum Nutt. Stem corymbosely branched above, grayish- 

 hirsutulous; leaves linear-spatulate or linear-oblanceolate, obtuse, entire, densely 

 hirsutulous; heads numerous; involucres 3-4 mm. high, 7-8 mm. broad; bracts 

 linear, acute, hirsute; ligules light purple or white, 5-6 mm. long. Low ground: 

 S.D. Tex. Ariz. Wyo.(? B.C.). Plain Mont. Jl-O. 



72. E. Wootoni Rydb. Biennial, with a taproot; stem 3-6 dm. high, finely 

 and densely hirsutulous; basal leaves oblanceolate, petioled, 3-10 cm. long, hir- 

 sutulous; stem-leaves linear, sessile; heads numerous, corymbose; involucres 

 hirsute, about 4 mm. high and 8 mm. broad; bracts linear, acute; ligules white, 

 6-7 mm. long. E. cinereus A. Gray. Sandy soil: Mont. N.M. Ariz. Son. 

 Submont. Je-Au. 



73. E. divergens T. & G. Biennial or perennial, with a taproot, branched 

 at the base; stems several, 2-4 dm. high, densely hirsute with short hairs; basal 

 leaves spatulate or oblanceolate, petioled, 2-6 cm. long, entire or rarely somewhat 

 lobed, hirsutulous; stem-leaves linear, sessile; heads numerous; involucres 4^5 

 mm. high, 8-10 mm. broad, hirsute; bracts linear, acute; ligules numerous, 

 bluish purple or lilac, about 5 mm. long. Low plains and river banks: Mont. 

 Tex. Calif. B.C. Son. Submont. My-Au. 



74. E. flagellaris A. Gray. Branched at the base; stem decumbent, usually 

 rooting at the ends and producing new plantlets, strigose; basal leaves spatulate 

 or oblanceolate, 2-4 cm. long, strigose; stem-leaves linear; peduncles naked, 4-10 

 cm. long; involucre 4 mm. high and 8 mm. broad, hirsute; bracts linear, acute; 

 ligules 5 mm. long, white or purplish. E. stolonifer Greene. E. MacDougalii 

 Heller. Banks of streams and valleys: S.D. N.M. Ariz. B.C.; Mex. Sub- 

 mont. Subalp. Ap-Au. 



75. E. commixtus Greene. Biennial; stem branched at the base, decum- 

 bent, hirsutulous, 1-3 dm. long; basal leaves narrowly oblanceolate, entire, or 

 more or less lobed at the apex, densely canescent, 2-4 cm. long; stem-leaves 

 narrowly linear; peduncles 5-10 cm. long; involucres hirsute, 4 mm. high and 

 about 8 mm. broad; ligules about 5 mm. long, white or pink. E. cinereus A. 

 Gray, not H. & A. E. colo-mexicanus A. Nels. River bluffs: Colo. Tex.- Ariz. 

 Utah; Mex. Son. Submont. Ap-Je. 



76. E. nudiflorus Buckley. Biennial; stem at first erect, 1-2 dm. high, 

 later producing spreading or decumbent branches, 1-3 dm. long, hirsutulous; 

 basal leaves spatulate, 4r-8 cm. long, petioled, hirsutulous; stem-leaves oblanceo- 

 late; heads solitary at the ends of peduncles often 1 dm. long; involucres hir- 

 sute, about 4 mm. high, 8-10 mm. broad; ligules numerous, white or pinkish, 

 7-8 mm. long. E. divergens nudiflorus A. Nels. Hills and river bluffs: Colo. 

 Tex. Ariz. Nev.; Mex. Son. Submont. Mr-Au. 



77. E. Wyomingia Rydb. Stem numerous, erect, 1-2 dm. high, striate, 

 strigose-canescent; basal leaves linear-spatulate, 2-5 cm. long, strigose-cinereous; 

 stem-leaves linear; heads solitary; involucres about 6 mm. high, 12-15 mm. 

 broad; bracts linear, acute, pubescent; ligules about 30, white or pinkish, about 1 

 cm. long; achenes 3-5-angled. Wyomingia cinerea A. Nels. * Dry hillsides : Wyo. 

 Colo. Plain Submont. My-Je. 



78. E. argentatus A. Gray. Stem 1-3 dm. high; basal leaves linear-ob- 

 lanceolate, 2-4 cm. long, 2-4 mm. wide, silvery white; stem-leaves scattered and 



"The genus Wyomingia seem to be well differentiated as far as the group CANI is con- 

 cerned, but both the LAETEVIBENTES and TETBAPLEURI connect it with CAESPITOSI and 

 the rest of the genus Erigeron. 



