Senecio. ' COMPOSITE. . 393 



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

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

 glabrous. — App. Frankl. Journ. ed. 2, 31; Hook. Fl. i. 334; Torr. & Gray, Fl. ii. 444 ; 

 Eaton, Bot. King Exp. 192. — Shady moist ground, from Mackenzie Eiver and Saskatch- 

 ewan, along the Kocky 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. Lenimon. 



++ +-i- ++ -H- ++ ++ Stems leafy, numerously or somewhat equably so up to the top, all pin- 

 nately lobed or parted, or when entire narrowly linear. 



= Leaves comparatively broad, pinnatitid and laciuiate : early glabrate if not glabrous. 



S. Clarkianus, Gray'. Stems strict and simple, 3 or 4 feet high, striate-angled : leaves 

 lanceolate ; cauline 4 to 7 inches long, sessile, simply pinnatifid or laciniate-dentate ; 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 Eancli. 

 = = 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 

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

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

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

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

 akeues canescent with a fine strigulose pubescence. — Prodr. vi. 429; Torr. & Gray, El. ii. 

 443 ; Gray, Bot. Calif, i. 411. 5. Regiomontanus, DC. 1. c. (Monterey, California), &. probably 

 S. sUechadiformis, DC. S. lomjilohus, Benth. PI. Hartw. 18; Gray, PI. Eendl. 108. S. Jili- 

 folius, Nutt. Trans. Am. Phil. Soc. vii. 414. S. RidddUi, S.JilifuHus, & S. spariioides, Torr. 

 & Gray, 1. c. S.Jhstif/iatus ? Gray, PI. 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. Parryi, Gray. Eather stout, a foot or two high, branching, sparsely leafy to the inflo- 

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

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

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

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

 nardino and San Francisco' Mountains, Lemmon, Greene. First coU. witliin the Mexican 

 lines, on the Eio Grande in Chihuahua, below San Carlos, Purri/. 



§ 3. Annuals or biennials. 



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



S. ampuUaceus, Hook. Lightly floccose or araneose-wooUy 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, cylindraceous, becom- 

 ing thickened and conoidal after antliesis : rays 7 to 9, oblong: akenes canescent. — Bot. 

 Mag. t. 3487 ; Torr. & Gray, Fl. ii. 440 ; Gray, PI. Lindh. i. 42. — Sandy prairies, Texas ; 

 first coll. by Dnunmond. 



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 pinnatifid, 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 : 

 akenes canescent. — Prodr. vi. 426; Torr. & Gray, 1. c; Gray, Bot, Calif, i. 410. *S'. Coro- 



