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. Bellidiastriim 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. lone. Low eroimd: 

 S.D.— Tex.— Ariz.— Wyo.—(? B.C.), Plain—MonL Jl-0. 



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 mmierous, 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. 

 —ouhmonL 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 

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

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

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

 bluish pui-ple or hiac, about 5 mm. long. Low plains and river banks: Mont.— 

 I ex.— 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; 

 hgules 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- 

 monLSubalp. Ai)-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 hnear; 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. 

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

 — Utah; Mex. Son.—SubmonL Ai)-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, 4-8 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, 

 7-6 mm. long E. divergens nudiflorus A. Nels, Hills and river bluffs: Colo.— 

 1 ex.— Aru.— Nev. ; Mex. Son.—Siibmont. Mr-Au. 



77. E. Wyomingla 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 hnear. 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. 



I ^\ ?' ^r^^^tatus A. Gray. Stem 1-3 dm. high; basal leaves linear-ob- 

 lanceoiate, 2—4 cm. lonp-. 2-4 mm -urirlo Hniro.^r -nrVii'+o. o+«^ t^^,,„^ ^ xx j i 



r.c.J!l^^^^f^^^ ^yomingia seem to be weU differentiated as far £ 



^h^^V^'Jlu^^^ ^^^ Laetevirextes and Tetrapleuri connect 

 tne rest of the genus Erioeron. 



