978 CAKDUACEAE 



Leaves and stem villous when young; leaves mostly acuminate; bracts purple- 

 tinged. 36. A. alpina. 

 Leaves densely villous-tomentose. 37. A. tomentosa. 



XI. Pedunculatae. 



Stem with tufts of brown wool at the base. 38. A. pedunculata. 



Stem without tufts of wool at the base. 39. A.fulgens. 



XII. Lessingian.^e. 



One species. , 40. A. Louiseana. 



1. A. Pairyi A. Gray. Stem 2-6 dm. high, somewhat hirsute-villous below, 

 glandular above; lower leaves petioled; blades ovate or ovate-oblong, usually 

 denticulate; upper leaves sessile, narrowly lanceolate, smaller and entire; head's 

 3-9; involucres broadly turbinate, 12-15 mm. high, glandular-hirsute; bracts 

 linear, attenuate; ligules usually none, but the marginal flowers sometimes 

 ampliate; achenes hirsute or glabrate; pappus bro\\'nish, subplumose. A. eradiata 

 (A. Grav) Heller. Mountains: Alta.—N.M.— Utah— Ore.— B.C. Mont.— Alp. 

 Jl-Au. 



2. A. paniculata A. Nels. Stem 4-7 dm. high, glandular and viscid-vil- 

 lous; blades of the basal leaves broadly ovate, subcordate at the base, 6-10 cm. 

 long, viscid-viUous on both sides; stem-leaves 3-4 pairs, the lower petioled, the 

 upper sessile; blades ovate, denticulate; heads paniculate-cymose; involucres 

 nearly hemispheric, 12-15 mm. high; bracts linear-lanceolate, acute or acuminate; 

 achenes hirsutulous. Moist woods: Mont. — Wyo. — Utah. Au. 



3. A. grandifolia Greene. Stem 3-4 dm. high, sparingly viUous-ciliate or 

 glabrous; basal leaf-blades ovate-cordate, 5-7 cm. long, toothed; stem-leaves 

 about 3 pairs, the lowest pair long-petioled ; blades cordate, with a narrow sinus, 

 10-15 cm. long, sahently toothed with triangular teeth, puberulent above, gla- 

 brous or nearly so beneath; upper stem-leaves subsessile, oval or ovate; involucres 

 nearly hemispheric, about 15 mm. high; bracts oblanceolate, short-acuminate. 

 Perhaps a large-leaved form of A. cordifolia. Mountain sides: Mont. — B.C. 

 Mont. Jl. 



4. A. cordifolia Hook. Stem 2-6 dm. high, somewhat viscid; basal leaf- 

 blades broadly cordate, usually coarsely toothed, 3-10 cm. long, puberulent, 

 and viscid-viUous on the veins; stem-leaves 2-4 pairs, all except the uppermost 

 petioled and cordate or rarely ovate; involucres campanulate-turbinate, 15-18 

 mm. high; bracts oblanceolate, acuminate. A. abortiva Greene, a small-leaved 

 form. Wooded hills: Alta. — Colo. — Calif. — B.C. Submont. — Siibalp. Je-Au. 



5. A. pumila Rydb. Stem 1-2, rarely 3 dm. high, viscid-viUous; basal 

 leaf-blades firm, ovate, rarely subcordate, entire or few-toothed, 2-5 cm. long, 

 puberulent; stem-leaves 1-3 pairs, short-petioled or the upper sessile; involucres 

 txubinate, 10-12 mm. high, puberulent and slightly villous. A. parvifolia Greene. 

 A. Evermannii Greene. Mountains: Alta. — Colo. — Utah^ — B.C. Mont. — Sub- 

 alp. Je-Au. 



6. A. granulifera Rydb. Stem about 3 dm. high, glandular-granuliferous; 

 basal leaves petioled, with probably cordate blades, fallen at the time of flower- 

 ing; lower stem-leaves obovate, dentate, about 5 cm. long, glandular-granulifer- 

 ous, thin, with strong ribs; upper stem-leaves ovate or cordate, sessile; heads 3-5; 

 involucre about 12 nun. high and 2 cm. broad; bracts oblanceolate, abruptly 

 acuminate, glandular-granuliferous and slightly ciliolate; ligules orange, about 1 

 cm. broad; achenes glandular-puberulent, striate; pappus dirty white, barbellate. 

 Mountains: Mont. Mont. Au. 



7. A. gracilis Rydb. Stem slender, 1-3 dm. high, glabrous; inflorescence 

 glandular-pruinose ; basal leaf -blades broadly ovate, dentate, 3-ribbed, 2-4 cm. 

 long, glabrous or nearly so; stem-leaves 2 or 3 pairs, the lower short-petioled, the 

 upper sessile and smaller; heads usually 1-5; involucres turbinate, about 1 cm. 

 high; bracts oblanceolate, acuminate; achenes sparingly glandular-pruinose. A. 

 lactucina Greene. A. Columbiana A. Nels. A. viuUiflora Greene, with more 

 numerous heads. (?) A. ovalijolia Greene. Mountain meadows: Alta. — Wyo. 

 — Wash. — B.C. Submont. — Mont. Je-Au. 



