880 CARDUACEAE 



V. MODESTI. 



Stem not hispid; heads distinctly pediincled; leaves slightly if at all auricled at the base, 



thin. 



Stem, especially upwards, with scattered long silky hairs; leaves not auricled, usually 

 somewhat hairy. 6. A. major. 



Stem glandular-puberulent or glabrous below, not long-hairy. 



Leaves and lower part of the stem glabrous, the former not auricled. 



7 ^4. iTiodGstus 

 Leaves short-pubescent, somewhat scabrous above; stem usually puberulent 

 throughout: leaves with small auricles. 8. A. Sayianus. 



Stem short-hispid; heads crowded, often subsessile, subtended by bract-like leaves; 

 leaves thick, strongly auricled at the base. 9. A. Novae-Angliae. 



VI. Campestres. 

 One species. 



VII. Obloxgifolii. 



■hirsutulous 



10. A. campestris. 



11. A. Kumleini. 



Leaves glabrous, except the bristly-ciliate margins, ascending. 12. A. Fendleri. 



13. A. alpinus. 



14. A. Jessicae, 



VIIL Alpini. 



One species. 



IX. MOLLES. 



One species. 



X. Radulini. 



Upper part of the stem and the involucres long- villous. 15. A, Richardsonii 



Upper part of the stem and involucres short-pubescent. 16. A. vieritus. 



XI. Andini. 



Stems decumbent or ascending, about 1 dm. high; leaves glabrate. 



stems erect, about 3 dm. high; leaves finely villous. 18.' aI WilliatrisiL 



XII. Griset. 



Leaves rather copiously and permanently appressed-hirsutulous. 



Inflorescence falsely racemose; lower leaves triple-nerved. 40. A. subracemosus. 



Inflorescence corjTubiform or paniculate; leaves all 1-nerved. 



Plant 3-4 dm. high; stem retrorse-hirsute below. 19, A. subgriseus. 



Plant 1-1.5 dm. high; hairs of the stem not retrorse. 20. A. griseolus. 



Leaves sparingly strigose and glabrate in age. or perfectly glabrous, except the hispidu- 



lous-cihate margins. 

 Bracts with a green tip and midvein. 



Stem stout; leaves oblanceolate, the lower often triple-nerved. 



c,. _ , , , , ,. ,, 61. A. Under It: oodiL 



Stem slender; leaves narrowly hnear-oblanceolate or Unear, l-nerved. 



Outer bracts green almost throughout. -- 21. A. violaceus, 



XIII. MULTIFLORI. 



Inflorescence very leafy, not corymbiform. 



Pubescence of the stem spreading or reflexed, hirsutulous. 



Heads less than 5 mm. high. 22. A. exiguus. 



Heads 6-8 mm. high. 23. A. crassulus 



Pubescence of the stem appressed or ascending. 



Bracts very unlike in length, well imbricate, the outer much shorter; heads race- 



mosely arranged, each at the end of a short leafy branch (except in no 25) 

 Bracts narrowly oblanceolate, the inner especially acutish; heads less than 5* 



mm. high. 



Stem much branched ; heads racemosely disposed on the more or less diverg- 

 ing branches. 24. A multiflorus 

 Stem simple below; heads few at the ends of the erect branches. 



Bracts broadly oblanceolate or the outer spatulate, very obtuse:^ h^eads^o^ 



5 nun. mgn. 26 A nnh/rpnhnh/Q 



^'^^^^oh'^Al^r'''''' °^'--°l-te. acute: ^^^ fj^^^ose. 



Inflorescence less leafy, corymbiform; leaves glabrous, merely hispid-ciUolate"disk 6-S 



mm. wide; stem slender. ^ ^^ii^iai/o, ui^.^. o a 



XIV. SAGITTIFOLII. ^- ^- ■'^"""• 



Basal leaf-blades cordate or broadly ovate; upper stem-leaves lanceolate; achenes gla- 



Petioles. midribs, and usually also the stem pubescent with long white hairs 



30. A. Wilsonii. 



