954 FLORA. 



variable in length. In woods, Conn, and southern N. Y. to Penn., Iowa, N. Car. 

 and Ky. Sept. -Oct. 



Aster Lowrieknus lancifolius Porter. Leaves lanceolate, appressed-serrate, only the 

 basal ones cordate. Southern N. Y. and Penn. to W. Va. and Ala. 



Aster Lowrieanus Bicknellii Porter. Leaves all lanceolate, all sharply serrate, or 

 the lowest incised, usually none of them cordate. Southern N. Y. and Penn. 



21. Aster Lindleyanus T. & G. Lindley's Aster. (I. F. f. 3754.) Stem 

 usually stout, glabrous, or sparingly pubescent. 3-10 dm. high, branched above. 



r tther thick, glabrous, or slightly pubescent, especially on the veins, the 

 lower and basal ones cordate at the base, sharply serrate, ovate, acute or acumi- 

 5 10 cm. long, with slender naked petioles; upper leaves ovate, or lanceo- 

 late, less serrate, or entire, sessile, or with margined petioles, those of the brandies 

 lanceolate or linear-lanceolate, smaller; heads usually not numerous, 8-IO mm. 

 high; involucre broadly turbinate or nearly hemispheric, its bracts linear-lanceo- 

 late, acute, rather loosely imbricated, glabrous, or nearly so, their tips green; rays 

 10-20, blue or violet, 6-10 mm. long; pappus nearly white. In open places, Lab. 

 to the N. W. Terr, and Br. Col., south to Me. and Mich. Aug. -Oct. 



Aster Lindleyanus eximius Burgess. Tall, sometimes 2 m. high; leaves thick, 

 usually rough and strigose-pubescent above, almost glabrous beneath; inflorescence 

 widely branched, loosely paniculate, often over 6 dm. long; rays bluish purple; heads 

 nearly 2.5 cm. broad; bracts linear, abruptly acute. N. H. to Ohio and Va. 



22. Aster Drummondii Lindl. Drummond's Aster. (I. F. f. 3755.) Stem 

 usuallv stout, finely and densely canescent, 6-15 dm. 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, 5-10 cm. 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 6-8 mm. high, rather 

 numerous on the racemose branches; involucre turbinate, its bracts linear, slightly 

 pubescent, acute or acuminate, their green tips appressed; rays 8-15, blue. 6 8 mm. 

 long; pappus whitish. In dry soil, borders of woods and on prairies, Ohio to 

 Minn., Kans., Ark. and Tex. Sept.-Oct. 



23. Aster sagittifolius Willd. Arrow-leaved Aster. (I. F. f. 3756.) 

 Stem stout, or slender, strict, glabrous, or sparingly pubescent above. 6-15 dm. 

 high, paniculately branched at the inflorescence, the branches ascending. Leaves 

 thin, slightly roughened, or glabrous above, usually giabrate beneath, the lower 

 and basal ones cordate or sagittate, ovate-lanceolate, sharply serrate, acuminate, 

 7-15 cm. long, with slender naked or narrowly margined petioles; upper leaves 

 lanceolate, sessile, or on short and usually margined petioles, serrate or entire, 

 tho>e of the branches very small; heads 5-8 mm. high, 16-20 mm. broad, numer- 

 ous, crowded, racemose; involucre turbinate, its bracts linear-subulate, glabrous or 

 nearlv so. their tips green and slightly spreading; rays 10-15. light blue or purp- 

 lish, 6 8 mm. long; pappus whitish. In dry soil, N. B. toN. Pal;., N.J., Ky. and 

 Kans. Aug. -Oct. 



Aster sagittifolius dissitiflorus Burgess. Differs from the typical form of the species 

 in its broader looser pyramidal inflorescence, the somewhat larger and longer pedun- 

 cled heads, the leaves less serrate, often none cordate. N.Y. to Fla., Miss, and Okla- 

 homa. , 



Aster sagittifolius urophyllus (Lindl. 1 ) Burgess. Leaves pilose beneath during growth, 

 persistently so on the veins rough, above, lanceolate, acuminate, the lower, or all of them, 

 cordate; stem often 15 dm. tall, the narrow inflorescence sometimes 9 dm. Ion;;; heads 

 about 6 mm. high; rays white. Grassy thickets and river-banks, N.Y. to .Minn. 



24. Aster Saunjersii Burgess, n. sp. Saunders' Aster. Puberulent on 1 

 the branches of the inflorescence, otherwise glabrous, or the petioles span': 

 ciliate; stem 3-6 dm. high. Basal leave- with narrowly margined or marginless 

 petioles, longer than the blades, the litter ovate, rather deeply cordate, serrate. 6- 

 IO cm. long; lower Stem- leaves similar, but with margined petioles, often broadly 

 so, the uppermost lanceolate chiefly entire, much smaller, partly clasping; heads 

 coryml>o>-e-paiiiculatc 2.5 cm. broad or less; rays apparently purple; involucre 



