148 



COMPOSITE. ^COMPOSITE FAMILY.) 



with slender spreading green tips: rays deep golden-yellow. — Fl. ii. 240. From 

 S. Texas to the plains of Colorado as far as the mountains. 



9. A. spinulcsus, DC. Canescently puberulent or glabrute: stems a span 

 to a foot high, cymoscly branching at summit: leaves pinnately and the lower 

 often bipinnately parted into rather numerous lobes; lobes and teeth, as well as 

 oppressed involucral bracts setaceous-tipped. — Plains, from the Saskatchewan to 

 Texas and westward to the Dakotas, Colorado, and Arizona. 



* * Bracts of the involucre from ovale to lanceolate or even linear, not rigid, all 

 of equal or about equal length: rays several or numerous: pappus soft and 

 white or whitish : leaves all entire. 



•*- Heads cymose or glomerate at the summit of a leafy stem: involucre campanu- 

 late: rays 12 to 20, small and marrow: akenes short and glabrous or nearly so. 



10. A. Parryi, Gray. Green and almost glabrous, puberulent, and some- 

 what viscid above: stems 6 to 18 inches high: leaves oblong-obovate and 

 spatulate, or the upper oblong-lanceolate, thinnish, 2 to 4 inches long: heads 

 nearly i inch high, rather numerous: involucral bracts oblong, obtuse, pale, 

 and in about three moderately unequal ranks: flowers pale yellow. — Am. 

 Jour. Sci. ii. xxxiii. 10. Mountains of Colorado to the Wasatch. 



■*- •*- Dwarf: heads solitary, terminating simple stems or branches: rays 



conspicuous. 



•*-r Wholly herbaceous, chiefly alpine, disposed to be cespitose, a span or less in 



height: leaves soft, not persistent : involucre hemispherical : rays 15 to 20. 



= Green, not ivoolly, mostly equably leafy up to the head. 



11. A. pygmseus, Gray. Less than a span high, soft-pubescent or gla- 

 brate, not viscid nor glandular : leaves from linear-spatulate to spatulate- 

 oblong : involucral bracts oblong, outer ones foliaceous and loose, very obtuse, 

 equalling the thinner innermost : akenes pubescent. — Am. Jour. Sci. n. xxxiii. 

 239. Alpine region of Colorado mountains. 



12. A. Lyalli, Gray. Rather taller, larger-leaved, viscid-puberulent : 

 leaves obovate-spatulate to oblanceolate : involucre glandular : its bracts lanceo- 

 leite, acute, sometimes 2 or 3 outermost oblong and more foliaceous : akenes 

 and ovaries glabrous or nearly so. — Proc. Acad. Philad. 1863, 64. Alpine 

 region of Colorado mountains ; also in Montana, Oregon, and northward. 



= = Woolly or tomentose, at least the involucre, above less leafy, or head 

 pedunculate. 



13. A. lanuginosus, Gray. Fully a span high from creeping root- 

 stocks, floccose-tomentose : leaves soft, narrowly spatulate or upper linear, an 

 inch or two long; the sparse uppermost almost filiform: bracts lanceolate, 

 acute or acuminate, thin, nearly equal, in two series, outer barely greenish: 

 akenes sericeous-canescent. — Wilkes Ex. Exped. xvii. 347. From Montana, 

 Watson, to the mountains of Washington. 



*+ ++ Depressed-cespitose from a multicipital woody caudex, glabrous or puberu- 

 lent : leaves rigid and persistent, crowded on the crowns of the caudex or on 

 shoi-t shoots, a few on the scapiform flowering stems: rays 6 to 15: akenes 

 canescently villous. 



14. A. acaulis, Gray. Leaves from spatulate to oblanceolate or linear, 

 mucronate, more or less 3-nerved and the broader ones veinv, coramonlv sca^ 



