378 



COMPOSITAE. 



[Vol. III. 



Aster paniculatus aciitidens Burgess. 

 Aster carneus var. ambiguus T. & G. Fl. N. A. 2: 133. 



184.1. Not A. ambiguus Thunb. 1832. 



Leaves oblong-lanceolate, the larger often 6' long by 

 \ x /i' wide, very sharply serrate, at least above the middle; 

 branches often very short, sometimes elongated. Along 

 streams and ditches, Connecticut to Virginia, Ohio and 

 Kansas. 



60. Aster Missouriensis Britton. 

 Missouri Aster. (Fig. 3794.) 



Stem densely puberulent or pubescent, at least 

 above, much branched, 2 high or more. Leaves 

 thin, oblong-lanceolate to oblanceolate, acute or 

 acuminate at the apex, sharply serrate above the 

 middle, gradually tapering to an entire sessile or 

 slightly clasping base, or the lower petioled, puber- 

 ulent above, finely pubescent beneath, the larger 

 3 / -4 / long, the upper much smaller, entire; heads 

 6' / -8 // broad, panicled, short-peduucled, or termi- 

 nating short leafy branchlets, sometimes somewhat 

 secund; involucre 2 // -3 // high, its linear acute bracts 

 well imbricated, ciliate or pubescent; rays white. 



In moist soil, Kansas and Missouri. Sept. -Oct. 



61. Aster Tradescanti L. Tradescant's 

 Aster. Michaelmas Daisy. (Fig. 3795-) 



Aster Tradescanti L. Sp. PI. 876. 1753. 



Stem slender, paniculately branched, 2-5 

 high, the branches usually ascending and often 

 pubescent in lines. Stem leaves linear-lanceo- 

 late or lanceolate, acuminate at the apex, nar- 

 rowed to a sessile base, 3 '-6' long, i^ // -6 // 

 wide, glabrous or nearly so on both sides, com- 

 monly thin, sharply serrate in the middle with 

 low teeth, or sometimes entire; heads very 

 numerous, racemose but not secund on the 

 branches, 5 // -S // broad; involucre hemispheric 

 to broadly turbinate, 2 // ~3 // high, its bracts 

 linear, acute, appressed, green-tipped, imbri- 

 cated in 4 or 5 series; rays white or nearly so, 

 numerous, 2 // ~3 // long; pappus white; achenes 

 minutely pubescent. 



In fields and swamps, Ontario to Virginia, west to 

 the Northwest Territory, Illinois and Minnesota. 

 Extends to Florida? Aug.-Oct. 



62. Aster Faxoni Porter. Faxon's 



Aster. (Fig. 3796.) 



Aster polyphyllus Willd. Enum. 888. 1S09. Not 



Moench, 1802. 

 Aster Faxoni Porter, Mem. Torr. Club, 5: 323. 1894. 



Glabrous throughout; stem paniculately or cor- 

 ymbosely branched; rather stout, 2-5 high. Stem 

 leaves lanceolate or linear-lanceolate, acute or 

 acuminate, narrowed to a sessile base, or the lower 

 into margined petioles, entire or nearly so, firm, 

 2 / -5 / long, 2 // -4 // wide, those of the branches grad- 

 ually smaller; basal leaves oblong to spatulate, ob- 

 tuse, dentate, heads not very numerous,6 // -9 // broad; 

 involucre hemispheric, nearly 4" high, its bracts 

 linear-lanceolate, acute or subulate, green-tipped or 

 green on the back, imbricated in about 3 series, the 

 outer shorter; rays bright white, 3 // -4 // long, numer- 

 ous; pappus white; achenes minutely pubescent. 



On moist cliffs, Vermont and Massachusetts to Penn- 

 sylvania, west to Wiseonsin(?) south to North Carolina 

 ( according to Gray I. Aug.-Sept. 



