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. SpinuloSUS, DC. Canescently puberulent or glabrate : stems a span 

 to a foot high, cymosely branching at summit : leaves pinnately and ihe lower 

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

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

 Texas and westward to Dakota, Colorado, and Arizona. 



* * Bracts of the involucre from ovate 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. 



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

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



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

 what viscid above : stems 6 to 1 8 inches high : leaves oblong-obovate and 

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

 nearly | 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 Wahsatch. 



H H Dwarf: heads solitary, terminating simple st<ms or branches: rat/s 



conspicuous. 



w- 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 woolltj, mostly equably leafy up to the head. 



11. A. pygmaeus, 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- 

 late, 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 Territory. 



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

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

 short shoots, a few on the scapiform flowering stems : rays 6 to 1 5 : akenes 

 canescently villous. 



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

 mucronate, more or less 3-nerved and the broader ones veiny, commonly sea- 



