908 CARDUACEAE 



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

 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, &-8 mm. broad; bracts linear, acute; 

 ligules white, nimierous, 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, obtiLse, 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-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 niunerous, 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. 

 — Suhmont. 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 niunerous; 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: Alont. — 

 Tex.— Calif.— B.C. Son.— Suhmont. My-Aw. 



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- 

 inont. — Subalp. Ap-Au. 



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

 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. — Suhmont. 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, 4-8 cm. long, petioled, hirsutulous; stem-leaves oblanceo- 

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

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

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

 Tex. — Ariz. — Nev.; Mex. Son. — Suhmont. 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 II 

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

 — Colo. Plain — Suhmont. My-Je. 



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

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



*The genus Wyomingia seem to be well difTerentiated as far as tlie group Cant is con I 

 cemed, but both the Laetevirentes and Tetrapleuri connect it with Caespitosi an< ( 

 the rest of the genus Erigeron. 



