988 CARDUACEAE 



S. contristatus Greene, a glabrous form with purplish involucres. Mountains: 

 Colo.— N.M. Mont.—Alp. Jl-Au. 



3. S. pudicus Greene. Stem leafy, often much branched, 3-8 dm. high; 

 basal leaves rather short-petioled, firm; blades about 1 dm. long, oblong or 

 narrowly lanceolate, acute, denticulate or rarely dentate; upper leaves linear, 

 sessile, entire, not clasping; inflorescence paniculate, with numerous heads; 

 branches erect; bracts linear, acute, 7-8 mm. long, about one-fourth shorter 

 than the disk, with inembranous margins. S. cernuus A. Gray. Mountain 

 meadows and creek-banks: Colo. — se Utah — N.M. Suhmont. — Subalp. Jl-Au. 



4. S. amplectens A. Gray. Stem 3-6 dm. high, leafy; lower leaves with 

 winged petioles, 7-15 cm. long, slightly floccose when young; blade oblanceolate. 

 very thin, sinuate-dentate or denticulate, acute or mucronate, tapering at the 

 base into winged petioles, clasping at the base; upper leaves oblong, more entire, 

 sessile, haK-clasping ; heads 1-4, nodding, about 2 cm. broad; bracts linear, 

 acuminate, about equalling the disk, purplish, the calyculate ones few; ligules 

 almost 2 cm. long. Wet subalpine places in open woods: Colo. — N.M. Mont. 

 —Alp. Jl-Au. 



5. S. pagosanus Heller. .Stem 2-4 dm. high, glabrous; lower leaves peti- 

 oled, 10-15 cm. long; blades oblanceolate, or elliptic, obtusish, deeply and .sharply 

 dentate, glabrous and somewhat glaucous; upper stem-leaves sessile, lanceolate, 

 tapering at the base; heads 1-4, nodding, on erect long peduncles; involucres 

 broadly campanulate, glabrous, 15-20 mm. broad; bracts linear, scarious-mar- 

 gined; ligules 15-20 mm. long. .S. lactucinus Greene (1900, not 1893). Alpine 

 regions: Colo. Suhalp. — -Alp. Jl-Au. 



6. S. seridophyllus Greene. Stem about 2 dm. high, 2-3-leaved, the lower 

 short-petioled, oblanceolate, the upper oblong or lanceolate; sessile, and half 

 clasping, thin, sinuate-dentate, 5-10 cm. long, slightly glaucous; head solitary 

 or 2 or 3, nodding, about 2 cm. in diameter; bracts very thin, light green, linear, 

 acuminate, shorter than the disk, the calyculate ones very few, about half as 

 long; ligules light yellow, about 15 mm. long and 3-4 mm. wide. Alpine regions: 

 Nev. — w Wyo. — Utah. Mont. — Suhalp. Au-S. 



7. S. Holmii Greene. Stem 1-2 dm. high, often almost scapiform, with 1, 

 seldom 2-3, large heads; lower leaves obovate or oblanceolate, 5-10 cm. long, 

 thin, shining, sharply sinuate-dentate, tapering at the base, obtu.se or acutish at 

 the apex, the upper ones much reduced, linear-lanceolate; heads about 15-20 mm. 

 broad, nodding; bracts linear or linear-lanceolate, acute, thin, with a membran- 

 ous margin, light green or tinged with purple; ligules light yellow, about 1 cm. 

 long. High mountains: Colo. — e Utah. Mont. — Alp. Jl-Au. 



8. S. taraxacoides (.V. Gray) Greene. Stem subscapose or with a few 

 leaves, 5-9 cm., seldom 10-12 cm. high; leaves 3-4 cm. long, oblanceolate or spatu- 

 late, or the stem-leaves, if any, lanceolate in outline, pinnatifid, with sharp tri- 

 angular salient lobes; head solitary, openly campanulate, 12-15 mm. broad; 

 bracts narrowly linear-lanceolate, acuminate, rather thick, about e(]ualling the 

 disk, the calyculate ones about half as long; ligules 8-14 mm. long. S. amplectans 

 taraxacoiden A. Gray. Alpine peaks: Colo. — N.M. Mont. — Alp. Jl-Au. 



9. S. Soldanella A. Gray. Stem about 1 dm. high, 3-4-leaved, perfectly 

 glabrous; leaves more or less petioled; blades orbicular, reniform, or obovate- 

 spatulate, rounded or somewhat cordate at the base, rounded or obtuse at the 

 apex, callou.s-denticulatc or subentire; head solitary, 15-18 mm. high and 2-3 

 cm. broad, erect or slightly nodding; bracts lanceolate, acute, often tinged with 

 purple, almost equalling the disk, the calyculate ones often long; ligules 6-10 mm. 

 long. Rocky places: Colo. Mont. — Alp. Jl. 



10. S. carthamoides Greene. Stem 2-5 dm. high, very leafy; leaves 

 thickish and somewhat fk^shy, obovate or spatulate, coarsely and sharjjly dentate 

 or somewhat pinnatifid-dentate, obtuse or acutish, 2-6 cm. long, sessile and 

 clasping; inflorescence leafy-corymbose; peduncles rather short; bracts lanceo- 

 late, acimiinate, about equaUing the disk, thick and somewhat fleshy, the calyc- 

 ulate ones narrowly linear-lanceolate, about one-third as long; hgules light 

 yellow, about 8 mm. long. Alpine regions: N.M. — Wyo. Mont. — Alp. Jl-Au. 



