992 , CARDUACEAE 



linear, sessile; cjTne compound, corymbiform; heads small; involucre about 8 mm. 

 long, almost cylindric; bracts broadly linear, acute, about two-thirds as long 

 as the disk; ligules light yellow, 6--8 mm. long; achenes glabrous. A. lugens 

 foliosus A. Gray, in part. Subalpine regions: Utah. Subalp, Jl. 



37. S. sphaerocephalus Greene. Stem 6-10 dm. high, striate, sparingly 

 woolly when yoxmg, leafy below; lower leaves 2-3 dm. long, wing-petioled; blades 



firm, oblanceolate sinuatelv nallnns-Hpnfnfp mnrf» n-r loaa +r.Tv.^r»frvaa ^n K^^+i. 



linear-lanceolate; heads in a corymbif 



', rather thick, black-tinned, much ? 



ligules 8 mm. long, orange or lemon; achenes hispidulous on the angles. S. alius 



Rydb. Wet meadows in the mountains: Mont. — Wyo. — Nev. — Ida. Mont — 

 Subalp. Jl-Au. 



* 



38. S. Hallii Britton. Plant densely white-tomentose; stems several, a 

 little over 1 dm. high; basal leaves 2-3 cm. long, distinctly petioled; blade spatu- 

 late, obtuse, thick, entire; stem-leaves linear, sessile; heads few, crowded, about.' 

 6 mm. high and as broad; involucre turbinate-campanulate; bracts broadly linear, 

 acute, densely tomentose; ligules light yellow, about 5 mm. long; achenes gla- 

 brous. Geyser formations: Yellowstone Park, Wyo, Mont. Jl-Au. 



39. S. Purshianus Nutt. Stems 1-2 dm. high; basal leaves broadly spatu- 

 late, entire, 3-5 cm. long, obtuse; cyme small, corymbiform; heads 2-10; involucre 

 campanulate, 7-8 mm. high; bracts linear-lanceolate, acute; ligules bright yellow 

 about 6 mm. long; achenes glabrous. Dry hills and mountain sides: Sask.— Tex. 



■Utah — B.C. . Plain — Alp. Je-Au. 



40. S. larimiensis A Nels. Stem 1-2 dm. high, floccose; basal leaves 4-5 

 cm. long, short-petioled; blades linear or linear-oblanceolate, entire, white-tomen- 

 tose; stem-leaves sunilar, but smaller and sessile; heads 10 mm. high or less* 

 bracts linear-lanceolate, acute, abnost glabrous, calyculate ones few, small and 

 subulate; hgules about 5 mm. long; achenes glabrous. Scarcely distinct from 

 S, Purshianus. Dry hills: Wyo.— S.D. (Black Hills). Plain. My-Jl, 



41. S. Howellii Greene. Stem 2-4 dm. high, finely white-tomentulose, in 

 age sometimes more glabrate; lower leaves 5-15 cm. long, with slender petioles 

 longer than the blades, white-tomentulose; blades oblanceolate, entire, the 



irymb 



outline 



or nearly so; bracts hnear-lanceolate, acute; ligules 8-10, yellow, about 5 mm 

 long; achenes glabrous. Hillsides and banks: Mont.— n Wyo.— Ore — Wash 

 Submont. — Mont. My-Jl, 



42. S. spatuliformis Heller. Stem 3-6 dm. high; leaves mostly basal, 1-2 

 dm. long, with long petioles; blades hnear-oblanceolate, entire or undulate, floc- 

 cose, sometimes glabrate above in age; upper stem-leaves small and scattered, 

 subulate, sessile; heads m an open corymb, about 1 cm. high; bracts linear, acute, 

 ahnost glabrous, yellowish; hgules bright yellow, 1 cm. long; achenes glabrous. 

 S. fashgiatus Xutt., not Schwein. S. leucocrinus Greene. Wet groimd mostly 

 near the coast: Ore. — ^Wash. — Ida. (ace. to Gray). Je-Jl. ' 



43. S. Harbourii Rydb. Stem 1-2 dm. high, striate, white-floccose, leafv; 

 basal leaves and most stem-leaves petioled, 3-10 cm. long, densely white-floccose; 

 blades oblanceolate or Imear-spatulate, entire; uppermost stem-leaves sessile 

 lanceolate, more or less auncled at the base; inflorescence corymbiform" heads 

 2-7, mostly 10-15 mm. high; bracts narrowly linear, long-attenuate, Hght yellow- 

 ish green and slightly floccose, the calyculate ones minute, subulate; rays bright 

 yellow, oyer 1 cm long; achenes brown, shining, glabrous, angled. Mountains: 

 Colo. Mont. — Alp. Ji-Au. 



44. S. canus Hook. Stem 3-5 dm. high; basal leaves petioled, entire 4-15 

 cm. long, obovate or spatulate, thick, obtuse; stem-leaves oblong or lanceolate 

 m outhne, more or less lyrate-pinnatifid or lobed, sessile, auricled; cyme com- 

 pound, corymbose; heads generaUy many, 10-12 mm. high; bracts narrowly linear- 

 lanceolate; hgules bright yeUow 8-10 mm. long; achenes glabrous. Dry hiUs: 

 Sask.— iSeb.— Colo.— Cahf.— B.C. Plain— Submont. My-Au 



