Chcenactis. COMPOSITE. 339 



Var. longiaristatus. A small form : iuvolucre only 2 lines high : pappus of 

 (mostly 3) more slender awns, subulate-dilated at base, much longer thati the corolla, rather 

 longer than the akene. Rattlesnake Bar, California, Mrs. Curran. 



153. CHJENACTIS, DC. (XaiW, to gape, and dim's, ray, the enlarging 

 orifice and limb of the marginal corollas in most species simulating a kind of 

 ray.) --Herbaceous or rarely suffrutescent (Western N. American) ; with alter- 

 nate mostly pinnately dissected leaves, and pedunculate solitary or sometimes 

 cymosely disposed heads of yellow, white, or flesh-colored flowers. Pappus more 

 commonly shorter or of fewer palete in the outer flowers. Akenes pubescent, 

 rarely glabrate. Prodr. v. 659 ; Benth. & Hook. Gen. ii. 401; Gray, Proc. 

 Am. Acad. vi. 545, x. 73. 



1. CIIJENACTIS proper. Pappus of entire or merely erose persistent paleae, 

 rarely obsolete : akenes more or less tetragonal or terete, slender. 



# Corollas yellow, the marginal ones with enlarged throat and limb, somewhat unequally or as if 

 palmately 5-lobed: annuals, mostly winter annuals, flowering in spring. 



H Pappus of 4 (rarely if ever '' 5 or 6 ") nearly equal narrowly oblong or oblong-lanceolate acut- 

 ish palete, at least the inner attaining to the throat of the corolla. 



C. lanosa, DC. Floccosely white-woolly when young, flowering from near the base with 

 (3 to 8 inches) long naked peduncles, the earliest scapiform : leaves thickish, simply pin- 

 nately parted into a few narrowly linear (rarely again parted) lobes no wider than the rhachis, 

 or uppermost entire : heads half-inch high : involucral bracts nearly linear : marginal 

 flowers moderately ampliate, not surpassing the disk. Prodr. 1. c. ; Torr. & Gray, Fl. ii. 

 370; Gray, Bot. Calif, i. 389. California, common from Monterey southward to San Ber- 

 nardino, &e. 



C. glabriuscula, DC. Taller, stouter, more caulescent, a foot or more high, thinly floccose, 

 at length denudate, branching above, and with stout sometimes elongated peduncles bearing 

 solitary heads of two-thirds to three-fourths inch high : leaves with more numerous and 

 irregular lobes : bracts of the involucre broader, thickish, glabrate, obtuse : marginal corollas 

 with much ampliate and more palmate limb, surpassing the disk. Prodr. 1. c. ; Gray, 1. c. 

 C. denudata, Nutt. PI. Gamb. 177. The var. mcyacephala, Gray, Pacif. R. Rep. iv. 104, 

 is merely a larger form. California, from valley of the Sacramento southward. 



C. tenuifolia, XUTT. Somewhat white-tomentulose when young, glabrate, loosely branched, 

 often diffuse, bearing scattered or paniculately disposed heads (a third of an inch high) on 

 short slender peduncles : leaves once or twice piriuately parted into irregular and small linear 

 or oblong or sometimes nearly filiform lobes : iuvolucral bracts narrow, rather rigid : limb of 

 marginal corollas short, not surpassing the disk. Trans. Am. Phil. Soc. 1. c. 375; Torr. & 

 Gray, 1. c. ; Gray, Bot. Calif. 1. c. C.Jilifolia, Gray, PI. Fendl. 98, the most slender-leaved 

 form. On the sea-shore occurs an opposite extreme, with primary divisions of the leaves 

 pinnatifid into very short and thickish lobes. Coast of California, from Santa Barbara to 

 San Diego ; also San Bernardino. 



H -t Pappus of very obtuse mostly unequal paleos, or obsolete. 



C. heterocarpha, GRAY. Lightly floccose, soon denudate, a span or two high, simple or 

 sparingly branched : leaves pinnately or .sometimes bipiuuately parted into irregular and 

 unequal rather crowded and short divisions and lobes : heads half-inch high, mostly on rather 

 long peduncles terminating stem and branches : bracts of the involucre broadly linear or 

 sometimes wider : limb of the marginal flowers conspicuously ampliate, surpassing the disk : 

 pappus of inner flowers of 4 elliptical-oblong paleiB fully half the length of the corolla, and 

 with 4 or fewer alternate outer and roundish very short ones, hut these occasionally wanting ; 

 in the outermost flowers all shorter or very short. PI. Fendl. 98, & Bot. Calif. 1. c. Var. 

 tnnaccti folia, Gray, 1. c. (C. tanacetifolia, Gray, Proc. Am. Acad. vi. 545), proves to be only 

 a stunted and condensed form. California, from the Upper Sacramento and Lake Co. to 

 San Bernardino Co. ; first coll. by Hartirci/. 



C. Nevii, GRAY, Proc. Am. Acad. xix. 30. Dwarf, rather stout, puberulent, or leaves nearly 

 glabrous : peduncles short : marginal corollas little ampliate : pappus of a few minute deuti- 



