322 composite. 



Centr.-Am. Bot. ii. 210. P. Californica, Gray, Proc. Am. Acad. v. 159, not Benth. P. Acmella, 

 Gray, PI. Pendl. 77, & Bot. Calif. 1. c, with P. Californica, mainly. Spilanthes Pseudo- 

 Acmella, Hook. & Arn. Bot. Beech. 150. Boltonia § Dichetophora sp., Benth. & Hook. Gen. 

 ii. 269. — California, from Monterey? southward, Lay $■ Collie, Coulter, Parish. (Mex.) 



Var. effusa. Very much branched from the annual root, paniculately floriferous: 

 leaves and heads smaller (the former half-inch or so, the latter only 2 lines high) : akenes 

 correspondingly small, narrowly obovate-oblong. — Santa Catalina Mountains, S. Arizona, 

 Pringle. 



++ ++ Style-branches tipped with setaceous-filiform acute hispidulous appendages: rays with 



naiTow ligules, or wanting in one species : disk-corollas slender, with long and narrow throat : 



akenes oblong : pappus of a rather conspicuous crown of squamellae and one long and delicate 



awn : heads 5 lines high : bracts of the involucre linear : perhaps perennials or with lignescent 



base, not improbably all of one species. 



P. leptoglossa, Gray. Minutely puberulent or glabrate, not at all glandular: leaves 



roundish-subcordate, coarsely and doubly crenate-dentate (half to three-fourths inch long) : 



rays oblong-linear, 4 lines long : akenes (a line long) linear-oblong, with comparatively short 



hispid ciliation, the setiform awn shorter than the disk-corolla. — PI. Fendl^77 ; Bot. Calif. 



1. c. — " California," Coulter, more probably from Arizona. 



P. Parryi, Gray. Minutely pubescent and obscurely viscid: leaves reniform-cordate, cre- 



nately dentate and often lobed (the larger inch broad) : rays oblong, barely 2 lines long : 



akenes (a line and a half long) oblong, strongly hirsute-ciliate : awn of the pappus nearly 



equalling the disk-corolla. — PI. Wright, ii. 106. — S. border of Texas, or on the Mexican 



side, in a canon of the Rio Grande below Presidio, Parry. Also mountains on the Texan 



side, Havard. 



P. aglossa, Gray, 1. c. Somewhat puberulent, obscurely viscid : leaves roundish, with 



subcordate or truncate base, mostly 3-5-cleft and coarsely dentate (the larger 2 inches broad) : 



bracts of the involucre very narrowly linear : rays none : akenes narrowly oblong, with 



rather short and dense hirsute ciliation : awn of the pappus equalling the disk-corolla. — 



Canon of the Eio Grande, with or near the preceding, Parry. 



136. PERlCOME, Gray. (JlepC, around, and KOfir;, a tuft of hairs; a 

 coma of long hairs all round the margin of the akenes.) — PI. Wright, ii. 82 ; 

 Benth. & Hook. Gen. ii. 406. — The latter authors indicate a Mexican radiate 

 species, of anomalous character, which they associate with the typical 



P. caudata, Gray, 1. c. Rather tall widely branching perennial herb, strong-scented, very 

 minutely puberulent : leaves opposite, long-petioled, green and membranaceous, minutely 

 somewhat resinous-atomiferous, triangular-hastate (2 to 5 inches long), with sparingly cre- 

 nate-dentate or entire margins, caudately long-acuminate, as also in less degree are the basal 

 angles : heads numerous in terminal corymbiform cymes, half-inch or less high ; flowers 

 golden yellow, conspicuously longer than the glabrous involucre : akenes linear-oblong ; the 

 flat faces glabrous, the nerviform margins densely villous-bearded : pappus a crown of 

 hyaline squamellae which are more or less connate and fimbriate-lacerate at summit, the 

 fringe dissected into bristles or hairs somewhat simulating those of the margin of the akene ; 

 also sometimes a slender awn from one or both margins of the akene. — Rocky canons, &c, 

 S. Colorado, New Mexico, and Arizona ; first coll. by Wright, Bigelow, &c. PI. late summer 

 and autumn. 



137. EATONELLA, Gray. {Prof. Daniel Cady Eaton, author of 

 Ferns of N. America, the Composites of King's Expedition, &c, grandson of 

 Amos Eaton for whom was named the genus Eatonia.) — Very floccose-lanate 

 annuals, of California and adjacent Nevada ; with mostly alternate leaves and 

 small sessile heads of yellow or white flowers : fl. spring or early summer. — 

 Bot. Calif, i. 379, as subgenus under Actinolepis ; Proc. Am. Acad. xix. 19. 



B. nivea, Gray, 1. c. Depressed in a small tuft from a slender root, an inch or so high, 

 subcaulescent, densely leafy, white with long and loose wool : leaves obovate-spatulate, entire, 



