364 



COMPOSITAE. 



[Vol. III. 



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



Asler Lindleyanus T. & G. Fl. N. A. 2: 122. 1S41. 

 Stem usually stout, glabrous, or spariugly 

 pubescent, i°-3''3° bigh, brauclicd above. 

 Leaves rather tbick, glabrous, or slightly pubes- 

 cent, especially on the veins, the lower and 

 basal ones cordate at the base, sharply serrate, 

 ovate, acute or acuminate, I'-i,' 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 linearlanceolate, 

 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 .ind British Columbia, south to Maine and 

 Michigan. Aug.-Oct. 

 Aster Lindleyanus eximius Burgess. 

 Tall, sometimes '" high; leaves thick, usually rough and strigose-pubescent above, almost 

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

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



21. Aster Drummondii Lindl. Drutn- 

 mond's Aster. (Fig. 3755.) 



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



i;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, cauescent 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.) 



Asler sagillifolius 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'— 

 5' 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 

 2'/i"-Y' high,!S"-io" broad, numerous,crowded, 

 racemose; involucre turbinate, its bracts linear- 

 subulate, ;;Iabrous or nearly so, their tips greeu 

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

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

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



In dry soil. New 



