364 



COMPOSITAE. 



[Vol.. III. 



20. Aster Lindleyanus T. & G. Lindley's Aster. (Fig. 3754.) 



Aster Lindleyanus T. & G. Fl. N. A. 2: 122. 1841. 

 Stem usually stout, glabrous, or sparingly 

 pubescent, i-3K high, branched above. 

 Leaves rather thick, glabrous, or slightly pubes- 

 cent, especially on the veins, the lower and 

 basal ones cordate at the base, sharply serrate, 

 ovate, acute or acuminate, 2 / -4 / long, with 

 slender naked petioles; upper leaves ovate, 

 ovate-lanceolate, or lanceolate, less serrate, or 

 entire, sessile, or with margined petioles, those 

 of the branches lanceolate or linear-lanceolate, 

 smaller; heads usually not numerous, 4 // -5 / ^ 

 high; involucre broadly turbinate or nearly 

 hemispheric, its bracts linear-lanceolate, acute, 

 rather loosely imbricated, glabrous, or nearly 

 so, their tips green; rays 10-20, blue or violet, 

 3 // -5 // long; pappus nearly white. 



In open places, Labrador to the Northwest Terri- 

 tory and British Columbia, south to Maine and 

 Michigan. Aug.-Oct. 

 Aster Lindleyanus eximius Burgess. 

 Tall, sometimes 7 high; leaves thick, usually rough and strigose-pubesc.ent above, almost 

 glabrous beneath; inflorescence widely branched, loosely paniculate, often over 2 long; rays bluish 

 purple; heads nearly 1' broad; bracts linear, abruptly acute. New Hampshire to Ohio and Virginia. 



21. Aster Drummondii Lindl. Drum- 

 mond's Aster. (Fig. 3755.) 



Aster Drummondii Lindl. in Hook. Comp. Bot. Mag. 



1:97. 1835. 



Stem usually stout, finely and densely canes- 

 cent, branched above, 2-5 high. Leaves mostly 

 thin, ovate or ovate-lanceolate, acuminate, rough 

 above, canescent beneath, the lower and basal 

 ones cordate, with slender naked petioles, sharply 

 toothed, 2 / ~4 / long, the upper cordate or rounded 

 at the base, usually on margined petioles, those of 

 the branches sessile and entire or nearly so, much 

 smaller; heads 3 // -4 // high, rather numerous on 

 the racemose branches; involucre turbinate, its 

 bracts linear, slightly pubescent, acute or acumi- 

 nate, their green tips appressed; rays S-15, blue, 

 3 // -4 // long; pappus whitish. 



In dry soil, borders of woods and on prairies, Ohio 

 to Minnesota, Arkansas and Texas. Sept. -Oct. 



22. Aster sagittifolius Willd. Arrow- 

 leaved Aster. (Fig. 3756.) 



Aster sagittifolius Willd. Sp. PI. 3: 2035. 1S04. 



Stem stout, or slender, strict, glabrous, or 

 sparingly pubescent above, 2-5 high, panicu- 

 lately branched at the inflorescence, the branches 

 ascending. Leaves thin, slightly roughened, 

 or glabrous above, usually glabrate beneath, 

 the lower and basal ones cordate or sagittate, 

 ovate- lanceolate, sharply serrate, acuminate, 3'- 

 6' long, with slender naked or narrowly margined 

 petioles; upper leaves lanceolate, sessile, or on 

 short and usually margined petioles, serrate or 

 entire, those of the branches very small; heads 

 -Yz"-^' high,8 // -io // broad, numerous.crowded, 

 racemose; involucre turbinate, its bracts linear- 

 subulate, glabrous or nearly so, their tips green 

 and slightly spreading; rays 10-15, light blue or 

 purplish, 3 // -4 // long; pappus whitish. 

 New Brunswick to North Dakota, New Jersey, Kentucky and Missouri. Aug.-Oct. 



In dry soil. 



