220 POLYGONACEAE 



39. E. chrysops Rydb. Scape 2-5 cm. high, floccose; leaves numerous, 

 clustered, oblanceolate or spatulate, 1-2 cm. long, white-floccose on both sides; 

 inflorescence 1-1.5 cm. in diameter; involucres campanulate, membranous, 3 

 mm. long; lobes as long as the tube; perianth 2.5-3 mm. long, campanulate; 

 lobes cuneate, slightly emarginate, the outer somewhat broader. High moun- 

 tains: Ore. — 'Vv Ida. Submont. — Alp. Je-S. 



40. E. Kingii T. & G. Scape less than 1 dm. high; leaves crowded on the 

 ends of the caudex, obovate or spatulate, 0.5-2 cm. long, white-woolly; heads 

 about 1 cm. in diameter; bract lanceolate, membranous; involucre turbinate- 

 campanulate, deeply 6-7-toothed, membranous; perianth about 3 mm. long; 

 lobes cuneate, emarginate. Mountains: Nev. — -Ida. Mont. Jl-Au. 



41. E. loganum A. Nels. Scape 5-20 cm. high, white-tomentose; leaves 

 basal, petioled, 2-5 cm. long; blades oblanceolate or spatulate, densely white- 

 tomentose on both sides, obtuse; involucre tubular-campanulate, 4-5 mm. long, 

 white- villous; lobes short, ovate; perianth 2-2.5 mm. long; lobes elliptic, sub- 

 equal; filaments pubescent below; achenes glabrous. Mountains: n Utah. 

 Submont. 



42. E. chrysocephalum A. Gray. Scape 4-15 cm. high; leaves petioled, 

 3-10 cm. long; involucre turbinate, ribbed, 3 mm. long; perianth 2.5-3 mm. 

 long, campanulate; lobes obovate-oblong, the outer usually slightly longer. 

 E. latifolium (T. & G.) A. Nels. Dry hills: Neb.— Colo.— Utah— Ida. Plain— 

 Mont. Jl-Au. 



43. E. medium Rydb. Scape 1-2 dm. high; leaves narrowly hnear, ob- 

 lanceolate, 3-10 cm. long, densely white-tomentose beneath, with somewhat 

 revolute margins, loosely floccose and greenish above; inflorescence capitate or 

 subumbellately branched, with a sessile involucre in each fork and small heads 

 on the branches; bracts ovate, acuminate, membranous-margined^ involucres 

 turbinate, 4 mm. high, loosely floccose or glabrate; perianth golden yellow, 4 

 mm. long, glabrous; segments oblong-obovate. Mountains: Utah. Submont. — - 

 Mont. Jl-Au. 



44. E. Brandegei Rydb. Scape 1-2 dm. high, floccose; leaves narrowly 

 oblanceolate, white-tomentose beneath, floccose above; inflorescence capitate; 

 bracts subulate, occasionally one of them elongated; involucres turbinate, about 

 4 mm. long, slightly floccose; lobes lanceolate; perianth rose-colored, 3 mm. long; 

 segments oblong, truncate or emarginate; fruit glabrous. Cailons: Colo. Son. S. 



45. E. depauperatum Small. Scapes erect, 5-10 cm. high; leaves crowded, 

 petioled; blades thinnish, linear-spatulate, 2-6 cm. long, revolute-margined, 

 glabrous above, tomentose beneath; bracts scale-like, lanceolate-subulate; 

 involucres 3.5-4.5 mm. high, densely tomentose; lobes about half as long as the 

 angled tube; perianth glabrous; lobes unequal, the outer oblong or obovate or 

 cuneate, the inner cuneate and narrower. Dry hills: (Black Hills) S.D. Sub- 

 mont. Je-Au. 



46. E. coloradense Small. Scape tomentose, about 1 dm. high; leaves 

 crowded, petioled; blades narrowly spatulate to linear-spatulate, 2-5 cm. long, 

 slightly revolute; bracts subulate; involucres campanulate, about 5 mm. long, 

 thinly woolly without; lobes suborbicular or rarely reniform; perianth-lobes 

 blunt, the outer ovate or orbicular-ovate, the inner smaller, oblong. Mountains: 

 Colo. Mont. Au-S. 



47. E. pauciflorum Pursh. Scape 1 dm. high or less; leaves crowded, 

 short-petioled, 3-8 cm. long; blades linear or linear-oblanceolate, revolute- 

 margined, white-tomentose beneath; bracts lance-subulate, sometimes mem- 

 branous-margined; involucres 4-5 mm. high; lobes petaloid, elliptic; perianth- 

 lobes elliptic, nearly equal. Sandy soil and dry places: Wyo. — ^Colo. — S.D. 

 Submont. — Mont. Jl-S. 



48. E. mancum Rydb. Pulvinate perennial; scape 2-4 cm. long, slender, 

 floccose; leaves narrowly spatulate, densely white-tomentose on both sides, 

 1-1.5 cm. long; inflorescence capitate; head 5-8 mm. in diameter, sometimes 

 with only 1 involucre; bracts ovate, membranous, floccose; involucres 2.5 mm. 



