374 



COMPOSITAE. 



[Vol. III. 



Hervey's Aster. (Fig. 3784.) 



49. Aster Radula Ait. Low Rough Aster. File-blade Aster. (Fig. 3783.) 



Aster Radula Ait. Hort. Kew. 3: 210. 1789. 



Stem glabrous, or puberulent above, slen- 

 der, corymbosely branched near the summit, 

 i-2 high. Leaves sessile, rough above, 

 more or less pubescent beneath, oblong- 

 lanceolate, acute, sharply serrate, strongly 

 pinnately veined, 2 / -3 / long, 3 // -i2 // wide; 

 heads several, or sometimes numerous, i / -i^ / 

 broad; involucre hemispheric, its bracts ob- 

 long or oblong-spatulate, coriaceous, ap- 

 pressed-pubescent, conspicuously ciliolate, 

 their green obtuse tips appressed; rays 20- 

 30, violet, 4 // -6 // long; achenes glabrous, 

 striate; pappus nearly white. 



In swamps, Delaware and southern Pennsyl- 

 vania to Newfoundland. July-Sept. 

 Aster Radula biflorus (Miehx. ) Porter, Mem. 

 Torr. Club, 5: 326. 1894. 

 Aster biflorus Miehx. Fl. Bor. Am. 2: 114. 1803. 

 Aster strictus Pursh. Fl. Am. Sept. 556. 1814. 

 Aster Radula var. strictus A. Gray, Syn. Fl. 1: 

 Part 2, 176. 1884. 



Lower, very slender; heads 1-3; leaves narrower, less serrate or entire ; involucral bracts,or some of 

 them acute. Mountains of New England to Labrador and Newfoundland. Perhaps a distinct species. 



50. Aster Herveyi A. Gray. 



Aster Herveyi A. Gray, Man. Ed. 5, 229. 1867. 



Stem roughish, at least above, slender, sim- 

 ple orcorymbosely branched, rarely paniculate, 

 i-3 high, the branches glandular-puberulent. 

 Leaves firm, rough above, pubescent on the 

 veins beneath, the basal and lower ones on 

 slender naked petioles, ovate, dentate with low- 

 usually distant teeth, acute at the apex, nar- 

 rowed, rounded or rarely cordate at the base, 

 2 / -6 / long, i / ~3 / wide; upper leaves sessile, or 

 narrowed into winged petioles, smaller, entire 

 or nearly so; heads \'-i]/ z ' broad; involucre 

 turbinate or campanulate, its bracts appressed, 

 or sometimes spreading, densely glandular, ob- 

 long or spatulate, obtuse or mucronulate; rays 

 15-25, violet, 5 // ~7 // long; achenes minutely 

 pubescent, striate; pappus nearly white. 



In dry soil, eastern Massachusetts and Rhode 

 Island. Apparently hybridizes with A. specta- 

 bilis. Aug. -Oct. 



51. Aster turbinellus Lindl. Prairie 

 Aster. (Fig. 3785.) 



Aster turbinellus Lindl. Comp. Bot. Mag. i: 98. 



1835- 



Stem slender, paniculately branched, glabrous 

 below, puberulent above, 2-3 high. Leaves 

 firm, lanceolate, or oblong-lanceolate, entire, 

 ciliate, acute or acuminate, 2 / -3 / long, the 

 lower and basal ones petioled, the upper ses- 

 sile, those of the branches much smaller; 

 heads about i / broad, mostly solitary at the 

 ends of the branches; involucre turbinate, its 

 bracts oblong, coriaceous, obtuse, appressed, 

 imbricated in 5 or 6 series, their tips green only 

 at the apex; rays 10-20, 2> // ~5 // long, violet; 

 pappus tawny; achenes finely pubescent. 



In dry soil, especially on prairies, Illinois to Mis- 

 souri, Kansas, Louisiana and Arkansas. Sept. -Oct. 



