874 CARDUACEAE 



2. T. exirnia A. Gray. Biennial, with a taproot; stem 1.5-4 dm. high, stri- 

 gose-hirsute; leaves linear-spatulate or linear-oblanceolate, strigose; bracts lanceo- 

 late, acuminate, the inner purplish, scarious and erose-ciliate on the margins; 

 ligules bluish purple, 15-18 mm. long; pappus of a coroniform ring of small 

 squamellae and in the disk-flowers besides these two stout awns. Mountain- 

 sides: Colo. N.M. Ariz. Son. Je-S. 



3. T. Vreelandii Rydb. A dark green biennial, branching near the base; 

 stems 1.5-4 dm. high, sparingly villous; leaves numerous, all oblanceolate, gla- 

 brous, mucronate, 4-8 cm. long, 5-8 mm. wide; bracts lanceolate, acuminate, 

 scarious, light green with dark green center; ligules bluish purple, 12-15 mm. 

 long; pappus of 2 subulate bristles, with a few intermediate squamellae. Moun- 

 tain-sides and valleys: Colo. Mont. Jl. 



4. T. Parryi D. C. Eat. Biennial; stem simple or branched at the base, erect, 

 2-20 cm. high, strigose; leaves mostly basal, spatulate, thick, glabrous above, 

 strigose beneath; stem-leaves few and small; involucre 2-3 cm. broad; bracts 

 narrowly lanceolate, acuminate, sparingly striate, scarious and erose on the mar- 

 gins; ligules 12-15 mm. long, violet or bluish purple; pappus of long bristles. 

 Mountains: Alta. Wyo. Ida. Mont. Alp. My-Jl. 



5. T. alpina (A. Gray) Rydb. Apparently perennial, rosulate-tufted, with 

 a taproot, acaulescent; leaves basal, spatulate, about 1 cm. long, grayish stri- 

 gose on both sides; involucre 12-18 mm. broad; bracts lanceolate, acuminate, 

 strigose, scarious and erose on the margins; ligules pink, puberulent outside, 

 scarcely 1 cm. long; pappus of long bristles. T. Parryi alpina A. Gray. High 

 mountains: Wyo. Alp. 



6. T. condensata Parry. Depressed stemless perennial; leaf-blades spatu- 

 late-obovate, 4-6 mm. long, petioled, lanuginous-arachnoid, rosulate, crowded; 

 bracts linear, acuminate; rays 100 or more; ligules narrow; pappus of all flowers 

 of many long bristles. High peak: Wyo. Alp. Jl. 



7. T. florifer (Hook.) A. Gray. Biennial; stem 1 dm. high or less, strigose, 

 branched at the base; leaves strigose; involucre 12-15 mm. wide; bracts linear- 

 lanceolate, acute, slightly imbricate and nearly of the same length, strigose, 

 narrowly scarious-margined and ciliate; ligules pink or rose-colored, about 1 cm. 

 long; achenes hirsute. Stony hills and banks: Wash. Mont. Utah Ore. 

 My-Jl. 



8. T. ambigua (A. Gray) Rydb. Stems several from the root, 8-10 cm. 

 high, strigose, leafy, from a slender root; leaves spatulate, strigose; Jnvolucres 

 about 15 cm. broad; bracts oblong-lanceolate, strigose on the back, with narrow 

 scarious erose margins; ligules white, about 1 cm. long; pappus of the ray-flowers 

 about half as long as that of the disk. T. scapigera ambigua A. Gray. Dry 

 valleys: Utah. Submont. 



9. T. Fendleri A. Gray. Perennial, with a slender taproot; stem 2 dm. high 

 or less, branched both at the base and above, strigose-canescent; leaves 2-4 cm. 

 long, 1-2 mm. wide, strigose; involucres 8-12 mm. broad; bracts ovate-lanceolate, 

 acute, strigose, erose-ciliate; ligules rose-colored, 7-8 mm. long; pappus of the 

 ray-flowers a short crown of squamellae and 1 or 2 short bristles. Gravelly hills: 

 N.M. Colo. Ariz. Son. Ap-Au. 



10. T. strigosa Nutt. Biennial or winter-annual; stems cespitose at the 

 base, 2-10 cm. high, strigose; lower leaves spatulate, the upper linear-oblanceo- 

 late, grayish-strigose ; involucres 8-12 mm. wide; bracts lanceolate, strigose on 

 the back, broadly scarious and erose on the margins, acute. T. Watsoni A. Gray. 

 Gravelly hills: Wyo. Utah N.M. Ariz. Submont. Mont. My-Jl. 



11. T. montana M. E. Jones. Cespitose perennial; leaves clustered, 2-3 

 cm. long, sparingly strigose, or glabrate, thick; peduncles 0.5-2 cm. long; invo- 

 lucres 10-12 mm. broad; bracts oblong, purple-tinged, narrowly scarious-mar- 

 gined and erose, in 5 series; ligules 6-8 mm. long, bluish purple, glabrous; achenes 

 in age nearly glabrous; pappus of both ray- and disk-flowers of many bristles. 

 T. dejecta A. Nels. High mountains: Utah. Mont. Subalp. My-Jl. 



