210 COMPOSITE. (COMPOSITE FAMILY.) 



15. S. petrSBUS, Klatt. Glabrous or early glabrate: leaves from, orbicular- 

 obovate or oval ( to inch long) to cuneate-oblong, entire or 3 to 7 -crenate-toothed 

 at the broad summit, abruptly petioled : scapes I to 3 inches high, bearing solitary 

 or several clustered heads ; these 4 or 5 lines high : rays 6 to 10, golden yellow, 

 3 lines long. S. aureus, var. alpinus, Gray. Alpine region of the mountains 

 of Colorado, Utah, and California. 



2. Leaves round-cordate, crenate, purple-tinged beneath, slender-petioled , more or 

 less clustered at the base of the scape : plants very glabrous. 



16. S. renifoliUS, Porter. Two inches high from filiform creeping root- 

 stocks : leaves thickish, resembling those of Ranunculus Cymbal-aria, rounded- 

 subcordate or reniform, only about inch wide, coarsely 5 to 7-crenate : scape 

 or peduncle little surpassing the leaves, bearing a solitary comparatively large 

 ( inch long) head: rays about 8, oblong, 4 lines long. Fl. Colorad. 83. 

 High alpine region on Whitehouse Mountain, in Central Colorado, at 13,000 

 feet, J. M. Coulter. 



c. Stems afoot or two high or less, bearing some leaves and corymbosely ci/mose 



heads. Mostly not alpine: usually somefloccose foment um. 



1. Leaves from entire or serrate to pinnatifid in the same species, none pinnately 

 divided : rays sometimes wanting. 



17. S. canus, Hook. Permanently tomentose-canescent, or at length floccu- 

 lent, but rarely at all glabrate : stems from a span to 2 feet high : leaves some- 

 times all undivided or even entire, the radical and lower from spatulate to oblong, 

 \ to \\ inches in length, slender-petioled, sometimes laciuiate-toothed or pin- 

 natifid : akenes very glabrous. From Dakota to Colorado and west to Cali- 

 fornia and British Columbia. 



18. S. aureus, L. Very early glabrate, usually quite free from wool at 

 flowering and a foot or two high from small rootstocks : radical leaves mostly 

 rounded and undivided, and cauline lanceolate and pinnatifid or laciniate : most 

 polymorphous species, of which the typical form is bright green, 1 to 3 feet 

 high : leaves thin ; principal radical ones roundish, cordate or truncate at base, 

 crenate-dentsite, 1 to 3 inches in diameter, on long slender petioles; lower 

 cauline similar, with 2 or 3 lobes on the petiole, or lyrately divided or lobed; 

 others more laciniate-pinnatifid and lobes often incised ; uppermost sparse 

 and small, with closely sessile or auriculate-dilated incised base : akenes quite 

 glabrous. Very abundant, across the continent. The following are the 

 principal forms within our range. 



Var. Balsamitae, Torr. & Gray. Less glabrate, not rarely holding more 

 or less wool until iruiting : depauperate stems a span or two, larger fully 

 2 feet high : principal or earliest radical leaves oblong, sometimes oval, com- 

 monly verging to lanceolate, inch or two long, serrate, contracted into slender 

 petioles; the succeeding lyrately pinnatifid: heads usually rather small and 

 numerous : akenes almost always hispudulous-pubescent on the angles. From 

 Texas to Colorado and British Columbia and eastward to Canada. 



Var. COmpactUS, Gray. A span or two high, in close tufts, rather rigid, 

 when young whitened with fine tomentum, glabrate in age : radical leaves 

 oblanceolate or attenuate-spatulate, entire or 3-toothed at apex, or pinnatijid-den- 

 tate, an inch or more long, thick and firm at maturity ; cauline lanceolate or 



