848 CARDUACEAE 



involucres 8 mm. high, 10-12 mm. broad; bracts subulate; ligules 8 mm. long; 

 pappus-bristles straight, 4 mm. long, barbellate above. Plains: Kans. Colo. 

 N.M. Plain Submont. Jl-Au. 



4. G. laciniata Rydb. Low perennial; stems slender, several, 3-5 dm. 

 high; lower leaves narrowly linear-oblanceolate, 1 cm. long, 3-5 mm. wide, 

 sparingly dentate; stem-leaves irregularly pinnately lobed or laciniate, with 

 narrow lanceolate divisions; involucre hemispheric, 10-12 mm. broad; bracts 

 lanceolate, with short subulate spreading tips; ligules 5-8 mm. long, numerous; 

 pappus-bristles curved, 3 mm. long. Mesas: se Utah. Son. Submont. Jl-Au. 



5. G. texana Scheele. Perennial; stem stout, 4-10 dm. high, glabrous or 

 nearly so, straw-colored; basal leaves oblanceolate; stem-leaves obovate or oval, 

 3-8 cm. long; involucre 1 cm. high, 2 cm. wide; ligules 12-15 mm. long; pappus- 

 bristles straight, slender, 5 mm. long. G. squarrosa grandiflora A. Gray, in part. 

 Plains: Colo. Tex. N.M. Plain Submont. Au-O. 



6. G. squarrosa (Pursh) Dunal. Biennial v or perennial; stem 3-6 dm. 

 high, corymbosely branched; basal leaves oblanceolate; stem-leaves oval, oblong- 

 ovate, or ovate, broad at the base; involucres 8-10 mm. high, 15-20 mm. broad; 

 ligules 8-10 mm. long. Prairies and plains: Sask. la. Kans. Ariz. Ida. 

 Plain Submont. Au-S. 



7. G. integerrima Rydb. Perennial, with a cespitose base; stems about 3 

 dm. high, glabrous, somewhat angled; leaves narrowly oblanceolate, 2-4 cm. 

 long, acute, strongly resinous-dotted; heads numerous, corymbose; involucre 

 about 7 mm. high and 1 cm. wide; ligules 6-7 mm. long. Sandy soil: Ida. Jl. 



8. G. Brownii Heller. Perennial, with a cespitose caudex; stems 3-6 dm. 

 high, red or purplish, glabrous; leaves spatulate or oblanceolate, acute, 3-5 cm. 

 long; involucres 8 mm. high, 10-12 mm. broad; ligules 6 mm. long. Plains: Ida. 

 Ore. Plain. Jl-S. 



9. G. serrulata Rydb. Biennial or perhaps short-lived perennial; stem 

 glabrous, about 6 dm. high; leaves sessile, oblanceolate or oblong, acutish, very 

 viscid, 3-5 cm. long; involucre very viscid, about 15 mm. broad; ligules 7-8 mm. 

 long, 1-1.5 mm. wide. Plains and hills: N.M. Wyo. Utah. Plain Submont. 

 Jl-S. 



10. G. perennis A. Nels. Perennial, sometimes cespitose at the base; stem 

 paniculately branched, 3-5 dm. high, glabrous; leaves entire or remotely den- 

 tate, oblanceolate, 4-7 cm. long, the upper sessile and clasping; involucres nearly 

 1 cm. high, 12-20 mm. broad; ligules 8-10 mm. long. Plains and hills: Sask. 

 Colo. Ida. Alta. Submont. Jl-S. 



11. G. subincisa Greene. Perennial, with cespitose base; stems decumbent 

 below, glabrous; basal leaves narrowly oblanceolate, 8-12 cm. long, glabrous or 

 nearly so, pinnately cleft or incised; stem-leaves oblong-lanceolate, sessile, coarsely 

 toothed; heads few; involucres about 1 cm. high and 2 cm. broad; ligules 8-10 

 mm. long. Hills: Colo. N.M. Ariz. Submont. Jl-S. 



12. G. erecta A. Nels. Biennial; stem glabrous throughout; leaves ample, 



Mont. Au-S. 



13. G. subalpina Greene. Low perennial; stem 2-4 dm. high; basal leaves 

 oblanceolate, coarsely and remotely toothed, scabrous-puberulent; involucres 8 

 mm. high, 12-15 mm. wide; rays many, 8-10 mm. long. (?) G. Eldorae Daniels. 

 Mountains: Mont. N.M. Utah B.C. Submont. Mont. Jl-S. 



14. G. inornata Greene. Perennial; stems several from the woody root, 

 low and stout; basal leaves oblanceolate, short-petioled, all saliently toothed 

 all around; involucres hemispheric, large; bracts all squarrose; pappus-bristles 

 barbellate below the very acute apex. Canons: Colo. 



15. G. fastigiata Greene. Perennial, sometimes suffruticose; stem 6-10 

 dm. high, glabrous; basal leaves oblanceolate, acute, remotely serrate; stem- 



