COMPOSITAE (composite family) 515 



Soc. Wash. il7: 1 179.i. 1904. It is possible that this name should be ret&ined 

 for the plaitts of our range land A. campesths restricted to the north Pacific 

 States.)-MJoiorado to Montana and westward. • ' , 



rl6i Aster. griseus-iQreene, Leaflets 1: 147. 1905. Stems decumbent' or 

 ascending,' 2-4 dm; 'high, branching, sparingly villous-hairy; foliaga and 

 bracts pale as it glaucous, but finely strigose-pubescent: lowest leaves ob- 

 lanoeolate, 5 cm. long; the cauline pblong-linear to linear; all obtuse,; entire, 

 1-nerved, cilisite or ciliolate: headsi of middle rsize,; involucres broadly cam- 

 panulate or nearly hBinispherica:l; the bjacts imbricated in 3 series, ereotjjap-. 

 pressed even to the tipsy.the outer obovate, obtuse,ithe inner more elongated, 

 acutish, all pubescent and more or less ciliate: rays many, showy, paleviolet. 

 — Mountains; of Colorado: i 



17. Aster ptarmicoides T. & G: Fl.i2: 160. 1842. Bather rigid, 27-5 dm. 

 high, in a tuft, from smooth to puberulent, bearing a corymbiform cyme of 

 several or numerous heads : leaves firm, linear or the lower spatulate-lanceolate : 

 bracts of thei involucre oblong4anceolate, obtuse, thickish, rather rigid: rays 

 4-8 mm. long; broadishi, pappus white, of rather rigid bristles, longer ones 

 manifestly clavellate at 'tip. (JJnamia ptarmicoides Greene, Leaflets 1:6. 

 1903.) — From Colorado to the Saskatchewan and: New England. 



18. Astermultiflorus Ait. Hort. Kew. 3: 203. 1789. Stem much branched 

 and bushy, grayish'-strigose, 3-20 dm. high, the branches ascending or spread' 

 ing: leaves rigid, hnear or linear-oblong, entire, mostly obtuse, sessile or' 

 slightly clasping at the base, strigose or glabrate, those of the stem 1-2.5 cm. 

 long, those of the toranches: very small and crowded: heads 6-8 mm. broad> 

 densely browdedi nearly sessile;: involucre turbinate,! 4-6 mm. high;: the bracts 

 coriaceous, pubescent, in 3 or 4 series, the short green tips obtuse or mm. 

 cronate,. spreading: rays 10-20, white,.3-4 mm. long :, pappus brownishrwhite; 

 achenes puberulent.-^In the northeastern part of our range to the New Eng- 

 land Statesi I . , 



' 19. Aster hebecladus DC. Prodr. 5: 242. 1836. Stems erect, ascending or 

 decumbent,'! usually simple below, i branched above, 4-7 dm., high, densely 

 hirsute with short' I divaricate hairs: stem leaves linear or oblong-linear, 

 3-6 cm. loQgi 2-3 mm. wide, rather firm, hirsute, with short spreading hairs, 

 acute with a'short spinulosetip; those of thebranchlets merging into the 

 bracts of the involucres: heads numerous; involucre, 5-8 mm. high; bracts 

 in 3^ series, minutelyrispinulose-mucronate, very thick, hirsute especially 

 on tht! margin, with oval herbaceous tip: rays white,'5-7 mm. long: achenes 

 strigose; ,i[4. crosswiiisRydb. Bull. Torr. Bot. Club 28: 504. 1901; A. exiguiis 

 (FemL)i Rydb. 1. <s. 505} A. poly ce^Iudus >Rydh. 1. c. 33: 153. 1906.]— From 

 the Dakotas to Texas and New Mejacol i I ; ; . m 



20. Aster commutatus Gray, Syn. Fl. 1: 185. 1884. Similar to the pre- 

 ceding species, except in thednflorescence; the stem rough-pubescent or some- 

 tiihes nearly glabrdus,i 4-7 dm.' high, with ascending or divergentiibranches: 

 leaves linear or Unear-oblong, obtusfe, entire, sessile or slightly clasping at the 

 base; those of the stem 2-7 .crh. long: heads larger than those of A.-multi- 

 florus, 12-16 mm; broad; involubre 6^8 mm. high, the bracts squarrose-tipp^d 

 and! 'Sbmetimes foliaceous: rays 20-30, about 6 mm. long. '(A<. adsurger.s 

 Greene^ Pitti 4: 216. 1900;^. incanopilosus Sheld. Bull. Torr. Bot. Club 

 20: 286. 1893; il;/afcdte Lindl. T. & G; Fl. 2: 126. 1842, as to our range.')— 

 Northwest territory to Texas and New Mexico. 



21... Aster Cordineri A. Nels.,,Bot. Gaz, 40: 64: 1905. Dark green and 

 seemingly glabrous but sparsely scabrous on the margins of leaves and in- 

 volucral bracts; stems 3-6 dm. long, generally simple below, racemosely 

 short-branched above, decumbetit at base and either widely spreading or 

 nearly erect, often puberulent especially upward,, very leafy: leaves broadly 

 linear, crowdedy spinulose-itipped; primary ones 4-7 cm. long,, 4-6 mm. broad; 

 secondary^ ones similar but smaller, more or less fascicled in the axils: heads, 

 solitary at the ends of the short, leafy, axillary, racemosely disposed branch- 

 lets, rather large; involucre nearly 1 cm. high and somewhat broader; bracts 

 erect, glabrate, dark green on the spatulate-linear blade, lighter at base, 



