358 COMPOSITAE hulsea 



ACTINELLA 



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

 cose or pannose toraentum, 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 dis- 

 tinctly larger nor different from the others; palese of the pappus from 

 linear-ligulate to narrowly oblong, 4-6 lines long. Rocky hillsides and 

 dry plains, Brit. Columbia to California, Montana and New Mexico. 



Var. alpina 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 mostly solitary heads surmounting the 

 subterranean branches of a multicipital perennial caudex or rootstock. 

 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 3-3 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 trun- 

 cate 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- 

 spatulate, pinnatifid or incised, mostly tapering below to a margined peti- 

 ole : 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 volcanic ashes 

 and scorise. 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 hemi- 

 spherical, its bracts in two or more series, somewhat herbaceous 

 or coriaceous, often rigid, the outer ones sometimes united. Re- 

 ceptacle from conical to convex, naked. Rays fertile. Style- 

 branches of disk-flowers dilated, truncate and somewhat penicil- 

 late at tip. Pappus of 5-13 thin and mostly hyaline scales with 

 more or less manifest costa, or none. 



A. Richardson! 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 cune- 

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

 eastern Oregon to Nevada, Utah and the Saskatchewan. 



