220 COMPOSITE. Erigeron. 



Fl. 561. E. alpinus & E. glabmtus, in part, Hook. Fl. 1. c. Trimorpboza vulgaris, Cass. Diet, 

 liv. 324. — Anticosti to Labrador, Saskatchewan, &c, to Brit. Columbia and Oregon, and in 

 the Rocky Mountains south to Colorado and Utah. (Eu., N. Asia.) 



Var. Drcebachensis, Blytt, 1. c. Somewhat glabrous, or even quite so : involucre 

 also green, naked, at most hirsute only at the base, often minutely viscidulous: slender 

 rays somewhat slightly exserted, sometimes minute and filiform and shorter than the pappus. 

 — E. Drcebachensis, O. Mueller, Fl. Dan. t. 874 ; Fries, Summa Scand. 182; Eeichenb. Ic. Fl. 

 Germ. xvi. t. 916. E. elongatus, Ledeb. Fl. Alt. iv. 91, & Fl. Ross. ii. 487. E. Kamtschati- 

 cus, DC. Prodr. v. 290. E. glabratus, Hook. Fl. ii. 18, mainly, not Hoppe. — New Bruns- 

 wick and the north shore of Lake Superior to the Arctic Circle and Kotzebiie Sound, south 

 along the Rocky Mountains to Colorado and Utah, at about 10,000 feet. Clearly passes into 

 the other form. (Eu., N. Asia.) 



Var. debilis. Sparsely pilose : stems a span to a foot high from an apparently per- 

 ennial root, slender, 1-3-cephalous : leaves bright green ; radical obovate or oblong ; cauline 

 spatulate to lanceolate, short : involucre sparsely hirsute or upper part glabrate, the attenu- 

 ate tips of the bracts spreading : rays in flower rather conspicuously surpassing the disk. — 

 Northern Rocky and Cascade Mountains, Montana, Canby, Sargent, at Woodruff's Falls, the 

 tips of involucral bracts strongly recurved. Mount Paddo, Suksdorf, Ho/well. Also Hud- 

 son's Bay, Burke, and N. Labrador, named by Steetz, E. Drcebachensis, var. hirsutus. Pass- 

 ing into that species or form. 

 E. armerisBfolius, Tukcz. Sparsely hispid-hirsute or the leaves glabrous and most of the 

 (narrowly linear and elongated) cauline bristly-ciliate : inflorescence more racemose and 

 strict : involucre sparsely hirsute : rays filiform, extremely numerous, slightly surpassing the 

 disk, whitish, no filiform ray less flowers seen (even in Siberian specimens, though described 

 by Turczauinow). — Cat. Baik. & DC. Prodr. v. 291 ; Ledeb. Fl. Ross. ii. 489 ; Gray, Proc. 

 Am. Acad. viii. 648, & Bot. Calif, i. 326. E. lonchophyllus, Hook. Fl. ii. 18. E. glabratus, 

 var. minor, Hook. 1. c, partly. E. racemosus, Nutt. Trans. Am. Phil. Soc. 1. c. 312. — Sas- 

 katchewan and along the Rocky Mountains to Colorado, mountains of S. Utah, Nevada, and 

 the Sierra Nevada, California. (N. Asia.) 



§ 3. CjENOtus, Nutt. Rays of the small and narrow seemingly discoid (and 

 mostly thyrsoid-paniculate) heads inconspicuous, little if at all surpassing the disk 

 or pappus ; the narrow ligule always shorter than its tube, often shorter than the 

 style-branches, or even obsolete : disk-flowers sometimes few, with usually 4-toothed 

 corolla : annuals or biennials, with the aspect of Conyza, and passing into that 

 genus : the pappus in the genuine species simple : bracts of the involucre not 

 rarely somewhat unequal and imbricated. — Gen. ii. 148 ; Benth. & Hook. Gen. 

 ii. 281. 



* Floccose-lanuginous with white wool, destitute of either hirsute or viscid pubescence. 

 E. eriophtfllus, Gkay. A foot or two high, bearing few heads on almost leafless branches : 

 lower leaves spatulate-oblong/obtuse, serrate near the apex (inch long) ; upper linear, entire : 

 involucre glabrate (3 lines high) : corollas purplish, not exceeding the pappus: akenes ob- 

 long-obovate, flat, callous-margined : pappus completely simple, somewhat deciduous in a 

 ring. — PI. Wright, ii. 77. — S. Arizona, on the Sanoita, Wright. 



* * Lightly arachnoid, but green and at length naked, somewhat viscid-pubescent. 

 E. SUbdecurrens, Schultz Bip. A foot or two high, strict, bearing numerous heads in a 

 virgate racemiform leafy thyrsus : leaves oblong-linear or lanceolate (inch or less long), spar- 

 ingly dentate, or the lower sometimes sinuate-laciniate, the base partly adnate-claspiug : invo- 

 lucre (2 lines high) sparsely hirsute with viscid hairs: flowers whitish: ligules very short : 

 disk-flowers 6 to 10: pappus scanty, somewhat deciduous in a ring. — Conyza subdecurrens, 

 DC. Prodr. v. 379. C. Coulteri, Rothrock in Wheeler Rep. vi. 155, not Gray. — Arizona, on 

 Mount Graham at 9,000 feet, Rothrock. (Mex., Schaffner, Parry & Palmer, &c.) 

 # * * Pubescence hirsute or hispid, neither lanate nor viscid, very leafy. 

 -I- Introduced weed : heads fully 3 lines high. 

 E. linip6lius, Willd. A foot or two high, rather strict, bearing loosely paniculate heads, 

 hirsute, also somewhat scabrous with minute appressed pubescence : upper leaves narrowly 



