Senecio. COMPOSITE. 393 



cled : iuvolucre campanulate or narrower, minutely bracteolate ; proper bracts commonly 

 purple-tipped : rays 7 to 9, 2 or 3 lines long: akenes either minutely papillose-cinereous or 

 glabrous. App. Fraukl. Jouru. ed. 2, 31; Hook. Fl. i. 334; Torr. & Gray, Fl. ii. 444 ; 

 Eatou, Bot. King Exp. 192. Shady moist ground, from Mackenzie River and Saskatch- 

 ewan, along the Rocky Mountains to those of New Mexico, Utah, and Arizona; first coll. by 

 Richardson. In canons of S. Arizona, a form with narrowest and even linear lobes to the 

 leaves, coll. L< mmou. 



K- -M- -H- -H- -H- -H- Steins leafy, numerously or somewhat equably so un, to the top, all pin- 

 natfly lobcd or parted, or when entire narrowly linear. 



= Leaves comparatively broad, pinnatiiid and laciniate : early glabrate if not glabrous. 



S. Clarkianus, Gu.vv. Stems strict and simple, 3 or 4 feet high, striate-augled : leaves 

 lanceolate ; cauline 4 to 7 inches long, sessile, simply pinnatifid or laciniate-deutate ; the 

 salient lobes or teeth lanceolate or triangular, very acute : heads several, cymose or some- 

 what paniculate, fully half-inch high, short-peduncled : involucre of subulate-linear bracts, 

 and several more slender loose calyculate ones : rays 4 or 5 lines long, narrow. Proc. Am. 

 Acad. vii. 362, & Bot. Calif, i. 413. Moist ground, in the Sierra Nevada, California, at 8,000 

 to 9,000 feet, Yosemite to Kern Co., Bolander, Rothrock, &c. ; first coll. at Clark's Ranch. 



= = Leaves or their divisions from linear to filiform, or broader toward the base of the stems. 



S. Douglasii, DC. Lignescent and sometimes decidedly shrubby at base, many-stemmed, 

 a foot or two or southward even 5 or 6 feet high, either white-tomentose or glabrate and 

 greeu : leaves thickish, sometimes all entire and elongated-linear (mostly 2 to 4 lines long 

 and 1 or 2 lines wide), more commonly pinuately parted into 3 to 7 linear or nearly filiform 

 entire divisions : heads several or numerous and cymose, from a third to half an inch high, 

 obscurely bracteolate, the proper bracts linear: rays 8 to 18, a third to half an inch long: 

 akenes canesceu,t with a fine strigulose pubescence. Prodr. vi. 429; Torr. & Gray, Fl. ii. 

 443 ; Gray, Bot. Calif, i. 411. A'. Reyioinontanu.t, DC. 1. c. (Monterey, California), & probably 

 S. stcechadiformis, DC. S. long'dobus, Benth. PI. Hartw. 18; Gray, PI. Fendl. 108. 8. fili- 

 folius, Nutt. Trans. Am. Phil. Soc. vii. 414. S. Riiltlcllif, S.jilifolius, & S. spariloides, Torr. 

 & Gray, 1. c. S.fastir/iatus? Gray, PL Wright, ii. 99, a peculiar and abnormal broader-leaved 

 form. Open plains and hills, Nebraska to Texas, S. Utah, Arizona, S. California, and 

 northward near the Pacific coast to Lake Co. 



2. Perennial ? viscidly pubescent : heads conspicuously radiate. 



S. ParTyi, GRAY. Rather stout, a foot or two high, branching, sparsely leafy to the inflo- 

 rescence, pubescent with short and spreading and some longer viscid hairiness : root not 

 seen : leaves irregularly dentate, oblong or the lowest spatulate, auriculate-clasping at base : 

 heads cymose or somewhat paniculate, about half-inch long: involucre sparsely calyculate : 

 akenes strigulose-canescent. Bot. Mex. Bound. 103. S. E. California on the San Ber- 

 nardino and San Francisco Mountains, Leminon, Greene. First coll. within the Mexican 

 lines, on the Rio Grande in Chihuahua, below San Carlos, Parry. 



3. Annuals or biennials. 

 * Indigenous species, of Southern range : heads conspicuously radiate: akenes seldom glabrous. 



S. ampullaceus, HOOK. Lightly floccose or araneose-woolly when young, glabrate and 

 smooth : stem mostly stout, a foot or two high, leafy to near the summit : leaves all undi- 

 vided, repand-dentate or entire (1 to 6 inches long), ovate or oblong; lowest obovate with 

 tapering wing-petioled base ; upper mostly clasping with broad base : heads rather numerous 

 in naked loose cymes : involucre (4 lines high) calyculate-bracteolate, cyliudraceous, becom- 

 ing thickened and conoidal after anthesis : rays 7 to 9, oblong : alicucs canescent. Bet. 

 Mag. t. 3487 ; Torr. Gray, Fl. ii. 440; Gray, PL Lindh. i. 42. Candy prairies, Texas ; 

 first coll. by Drummond. 



S. Calif ornicus, DC. Early glabrate if not glabrous, slender, a foot or so high: leaves 

 lanceolate, linear, or the lower oblong, varying from denticulate to piuuatifid, the lobes short 

 and obtuse, all but the lowest auriculate-sessile or clasping at base (one or two inches long) : 

 heads several and loosely paniculate or cymose at the naked summit of the stem : involucre 

 broadly campanulate, 3 or 4 lines high, nearly naked at base : rays oblong, 3 or 4 lines long : 

 akeues canescent. Prodr. vi. 426; Torr. & Gray, 1. c. ; Gray, Bot. Calif, i. 410. S. Coro- 



