320 CUMPOSITJ;;. Sfricocurjnts. 



short anil more or less spreading green tips, imbricated ; the outer successively 

 shorter, lieceptaclo smull, alveolute-tootlied. Style-appenduges lanceolate-subulate. 

 Akenes narrow, little if at all compressed, silky-pubescent or villous (whence the 

 generic name). Pappus simple, of copious capillary bristles. — Perennial Aster-like 

 herbs, with corymbed and rather small heads ; the disk-tlowers pale yellow, and 

 the i-ather small rays white. 



A genus of thiee spucius of the Atlantic Uuited States, nnd of the following on the raciliu 

 side of the continent. 



1. S. rigidus, Lindl. A foot or two high, scabrous with some very short and 

 rigid i)ubescence, or almost glabrous, leafy to the top : Icave.s oblong-lanceolatu, 

 acute or obtuse, entire, an imdi or two in haigth : heails half an inch or less in 

 K'ligLh : rays narrowly oblong, sometimes not exceeding the white pap[)us : akenes 

 slender, clothed with Ihie short pubescence. — JS. Oreyunensis, jShitt., the state with 

 rays conspicuous. 



In woods, base of Mt. Shasta (Urewer), Yoseniito Valley (Bulandcr), and near Donner Lake 

 {Turrey) ; e-xtending to Washington Territory. 



20. CORETHROGYNE, DC. 

 Head many-Uowereil, heteroganious ; the rays numerous in a single series, neutral ! 

 Involucre hemispherical or turbinate ; the scales narrow, mostly with green or green- 

 ish and more or less s[)reading tips, imbricated in several series, the exterior mostly 

 shorter. Peceptacle fiat, naked or somewhat alveolate, rarely with some chalF simi- 

 lar to the innermost involucral scales interposed among the outer flowers. Anthers 

 tipped with a slender cuspidate appendage, as in Lessinyia. Style-appendages short, 

 triangular-lanceolate or subulate, densely beset Avith long hispid bristles, forndng 

 a brush-like tuft (whence the generic name). Akenes and pappus of the ray abor- 

 tive or rudimentary, of the disk compressed like those of Aster, silky-vilious or 

 l)ubescent : the i)ap[)us simple, of rather copious but rigid iind unequal capillary 

 bristles. — Pather low Aster-like herbs, apparently always perennial, branched 

 from a somewhat woody base or rootstock, more or less white-woolly at least when 

 young ; the alternate leaves serrate with some sharp or coarse teeth towards the 

 apex, or entire ; heads middle-sized, solitary terminating the branches or somewhat 

 corymbose-panicled : rays violet, purple ov blue : disk yellow, sometimes changing 

 to purple : pappus becoming tawny or reddish. — Torr. & Gray, Fl. ii. D7 ; (Jray in 

 Pot. Mex. Bound. 7G, & Proc. Am. Acad. vii. 351. 



De Candolle's character of chaff on the receptacle applies only to Douglas's specimens of the 

 original C. Calif ornica ; and in those it is not constant ; so that the species must inchule C incana, 

 Nutt. Then all those with smaller and (when well develoiied) corymbose-panicled heads appear 

 to belong to one species which blossoms through the season and under diti'erent exposures : some 

 of the forms gathered and described were winter states. The genus is a particularly well-marked 

 one, most related on the one hand to Lcssiiujiu, on the other to Aster. 



* Bristles on the sfi/le-(ijjs forminy a rather scanty and small tuft : involucre cam- 

 panulate or turbinate. 

 1. C. filaginifolia, Nutt. Stems erect or ascending, about a foot high, com- 

 monly branching corymbosely or paniculately at the summit and bearing several or 

 numerous rather small heads : leaves oblanceolate or narrowly spatulate, the upper 

 gradually reduced to subulate bracts : involucre (4 lines long) between turbinate 

 and campanulate ; tlie numerous scales a)»pressed, or with oidy the short greenish 

 lips squarrose-sjjreading, the outer regularly shorter, all glabrous or at lirst more or 



