Erigeron. COMPOSIT.E. 329 



■(- -f- -t- Leaves oitire and narrow, numerous all along the hranchinrj jlowering stenix: 

 akenes in all "l-nerved or onli/ some of the outermost ^nerved. 



++ Leaves all filiform, canescent. 



9. E. filifolium, Nutt. Hoary Avitli minute appressed pubescRnce ; stonis a 

 span to a foot or more high from a somcwliat woody (lecumhont base or brancliinfj 

 rootstock, slender, usually coryml)osely branching : leaves very narrowly linear (an 

 inch or two long, a lino or much less in width), and becoming filiform, the upper- 

 most reduced to miniito subidate bracts : invohicro canescent and somewhat hirsute, 

 2 or 3 lines high, the outer scales shorter: rays CO to 80, white or pink (3 or 

 4 lines long) : akenes sparsely and minutely hairy, becoming glabrous : pappus 

 almost simple;, the short outer bristles indistinct. — Diplopappus filifolius, Hook. 

 Chrysopsis canescens, DC. 



Phimas Co. {Lcmmon) ; near Carson City {Anderson), thence northward, rather common in 

 the interior districts to Oregon and Idaho. 



++ ++ Leaves fl,at, from narroivly linear to lanceolate. 



= Pappus simple or the outer of fine and short bristles : heads (except in the last) 

 corymbose at the summit of the very leafy stern : rays in a single series. 



10. E. Breweri, Gray. Somewhat hoary with fine and short scabrous-hirsute 

 pubescence : stems ascending or erect from a slender creeping rootstock, a span to a 

 foot high, slender, leafy to the summit, bearing solitary or few corymbose heads : 

 leaves short (half an inch to an inch long), linear-spatulato or narrowly ol>lance- 

 olate : involucre glabrous (2 or 3 lines high) ; its scales glabrous, unequal, the outer 

 successively shorter: rays only about If) (remarkably few for an Erigcrnn), violet, 

 narrow : pappus nearly simple, the outer set of bristles if present very short and 

 inconspicuous. — Proc. Am. Acad. vi. 541. 



Woods of tlie SieiTa Nevada, Mariposa Co., at 4,000 to 6,000 feet, Brewer, Torreij, Gray. 

 Above Carson City, Nevada, Avdcrson. This might as well be ranked as an Asler, of the 

 Orthomcris section, except for the style-appendages and an obvious relationship to some of 

 t"he following species. 



11. E. corymbosum, Nutt. Scabrous-hirsute and somewhat hoary with short 

 spreading pubescence : stems clustered, erect, a span to a foot or more high, corym- 

 bose nt the summit, bearing several pedunculate heads: leaves linear or linear- 

 lanceolnte, acute, tapering to the base, about 2 indues long: involucre canescentiy 

 hirsute (2 or 3 lines high), formed of nearly equal scales : rays 30 or 40, violet or 

 purple, slender : the short bristles of the outer pappus rather manifest. — Torr. & 

 Gray, Fl. ii. 178. 



Eastern slope of Providence Mountains, Dr. Cooper. Incomplete specimens, perhaps not of 

 this species, which holongs much further north, in the interior of Oregon, kc, hut mny he 

 expected along the noitheastern borders of the Stat*. The lioary pulwscence principally, and 

 probably insumciently, distinguishes this from E. dcctimbeiui, Nutt., of Oregon, which, in turn, 

 nearly approaches the next. 



12. E. foliosum, Nutt. Sparsely and minutely scabrous-hirsute, or nearly gla- 

 brous : stems erect from a creeping rootstock, one or two feet high, coryrabosely 

 branched above, bearing several short-peduncled heads : leaves numerous to the 

 summit, either broadly or narrowly linear, obtuse (from an inch to at most 2 inches 

 long, and from 2 lines to half a line wide), the lowest sometimes spatulatc : invo- 

 lucre varying from minutely hirsute to glabrous (3 lines high), the narrow scales 

 unequal : rays 30 or 40, narrow, purple-blue or white (sonietimes none) : short 

 bristles of the outer pappus present, but inconspicuous. — Nu(t. in Trans. Am. I''hil. 

 Soc. n. ser. vii. 309, & PI. Gamb. 177. J'J. Dnuglasii, Torr. k Gray, Fl. ii. 177. 

 Diplopappus (V) occidentalis, Hook. A' Arn. —A broader-leaved form with conspicu- 

 ous purple rays is the type of this polymorphous species. The extreme fornis to be 

 noted as varieties are 



