358 COMPOSITE holsea 



ACTINELLA 



C. Douglasii H. & A. 1. c. 354. Pubescent with a fine somewhat floc- 

 cose or pannose tomentum, or sometimes early glabrate : stems stout, 6-18 

 inches high, paniculately branched: leaves mostly of broad outline, and 

 bipinnately parted into crowded short obtuse divisions and lobes : heads 

 6-9 lines high, in large plants numerous and corymbosely cymose, : bracts 

 of the involucre linear or spatulate, obtuse : marginal corollas not distinctly 

 larger nor different from the others : paleee of the pappus from linear-ligu- 

 late to narrowly oblong, 4-6 lines long. Rocky hillsides and dry plains, 

 Brit. Columbia to California Montana and New Mexico. 



Var. alpiua Gray Syn. Fl. i, pt. 2, 341. " Dwarf, 3-5 inches high., 

 consisting of a rosette or thick tuft of leaves with very close divisions, and 

 naked or scapiform stems, bearing mos'iy solitary heads surmounting the 

 subterranean branches of a multicipital perennial caudex or root stock. 

 Alpine region of the Rocky and Cascade Mountains. " 



66 HULSEA T. & G. Bot. Mex. Bound. 98. 



Viscid-pubescent and balsamic-scented herbs with alternate 

 mostly sessile leaves and solitary or scattered large heads of yel- 

 low flowers, or the rays sometimes purple. Involucre many- 

 flowered, hemispherical, its thin herbaceous bracts in 2-3 series. 

 Receptacle flat. Rays numerous, ligulate but sometimes short 

 and inconspicuous; disk-corollas with proper tube slender, but 

 shorter than the cylindraceous throat. Style-branches short and 

 with thickened obtuse tips. Achenes linear-cuneate, compressed 

 or somewhat tetragonal, soft- villous. Pappus of mostly 4 truncate 

 wholly hyaline scales. 



H. nana Gray Pacif. R. Rep. vi, 76, t. 13. Villous-hirsute when young: 

 stems stoutish, bearing a single large head, 2-8 inches high, from a long 

 branching rootstock: leaves mostly radical, 1-2 inches long, oblong-spatu- 

 late, pinnatifid or incised, mostly tapering below to a margined petiole : 

 involucre 6-8 lines high, of lanceolate acute bracts : rays about 30, broadly 

 linear, 6-8 lines long: scales of the pappus usually longer than the breadth 

 of the achene, incisely or fimbriately lacerate. In valcanic ashes and scoriae, 

 Mount Adams Washington to Mount Shasta California. 



67 ACTINELLA Pers. Syn. ii, 469. 



Mostly low herbs with alternate narrow or* narrowly lobed leaves 

 and slender-peduncled heads of yellow flowers. Heads (in ours), 

 radiate. Involucre many-flowered, campanulate or hemispherical, 

 its bracts in two or more series, somewhat herbaceous or coriace- 

 ous, often rigid, the outer ones sometimes united. Receptacle 

 from conical to convex, naked. Rays fertile. Style-branches of 

 disk-flowers dilated, truncate and somewhat penicillate at tip. 

 Pappus of 5-12 thin and mostly hyaline scales with more or less 

 manifest costa, or none. 



A. Richardsoni Nutt. Trans. Am. Phil. Soc. vii. 379. Stems tufted 

 from a multicipital perennial caudex, 8-12 inches high, obscurely puberu- 

 lent or nearly glabrous, woolly in the axils of the radical leaves : upper 

 leaves mostly once and the lower twice ternately parted into long and sim- 

 ple filiform-linear rather rigid lobes : involucre campanulate, 2-3 lines high, 

 6-9-angled, the 6-9 outer bracts strongly carinate, united below : rays cu- 

 neate, 2-4 lines long : scales of the pappus attenuate-acuminate. Plains of 

 eastern Oregon to Nevada Utah and the Saskatchewan. 



