958 FLORA. 



nearly white, o-io mm. long; pappus pale. In swamps and bogs, N. S. to the 

 N. W. Terr., south to N. J., Ohio, Wis. and in the Rocky Mts. July-Sept. 



40. Aster adscendens Lindl. Western Aster. (I. F. f. 3772.) Stem 

 slender, rigid, glabrous, or sparingly hirsute-pubescent, branched or simple, l-5-( 

 dm. high. Leaves firm, entire, rough-margined, sometimes ciliolate, those of th< 

 stem linear-lanceolate or linear-oblong, acute or obtusish, 2-7 cm. long, 4-10 mm 

 wide, sessile by a more or less clasping base; basal leaves spatulate, narrowed intc 

 short petioles; heads not numerous, about 25 mm. broad; involucre hemispheric, it; 

 bracts imbricated in 3-5 series, oblong-linear or spatulate, their tips obtuse oi 

 obtusish, slightly spreading, the inner often mucronulate; pappus nearly white: 

 achenes pubescent. On prairies and moist banks, western Neb. to Wyo., Mont, 

 and the N. W. Terr., west to Colo., N. Mex. and Nev. July-Sept. 



41. Aster Novi-Belg/ii L. New York Aster. (I. F. f. 3773.) Stem slen- 

 der, usually much branched, glabrous, or slightly pubescent above, 3-9 dm. high. 

 Leaves lanceolate, oblong-lanceolate, or linear-lanceolate, firm, entire, or slightly 

 serrate, glabrous, or very nearly so, acuminate at the apex, narrowed, sessile and 

 more or less clasping at the base, 5-12 cm. long, 6-16 mm. wide, the lowest petioled; 

 heads corymbose-paniculate, usually numerous, 2-3 cm. broad; involucre hemi- 

 spheric to campanulate, its bracts linear, acute, green, somewhat spreading, in 

 3-5 series, the outer shorter; rays 15-25, violet, 8-10 mm. long; pappus whitish; 

 achenes glabrous or nearly so. In swamps, Newf. to Me. and Ga., mainly near 

 the coast. Aug. -Oct. 



Aster N6vi-Belgii litbreus A. Gray. Low and spreading, more or less fleshy, much 

 branched ; leaves shorter, broader, thickish, acute, 3-6 cm. long ; principal bracts of the 

 involucre obtuse, loose, spatulate. Along salt-marshes, Pr. Edw. Isl. and Quebec to Ga. 



Aster N&vi-Belgii elodes (T. & G.) A. Gray. Leaves narrowly linear-lanceolate, often 

 elongated to 10-15 cm. ; bracts of the involucre acute. In moist ground, southern N. Y. 

 to N. Car. 



Aster N6vi-Belgii Atlanticus Burgess. Leaves lanceolate, tapering from the middle 

 to an acuminate base and apex, sometimes 25 mm. wide ; heads usually fewer ; inflores- 

 cence racemose-corymbose. In shaded swamps, Mass. to N. Car. 



Aster Novi-Belgii Britt6nii Burgess. Leaves thick; heads short-peduncled, racemose- 

 spicate toward the ends of the branches; green tips of the bracts short. Mass. to south-/ 

 eastern N. Y. and Va., near the coast. 



42. Aster longifolius Lam. Long-leaved Aster. (I. F. f. 3774.) Stem glai 

 brous, or somewhat pubescent, leafy, paniculately branched, 3-9 dm. high. Leaves 

 lanceolate to linear lanceolate, entire or nearly so, acuminate, narrowed into I 

 Sessile clasping usually slightly cordate base, 7-20 cm. long, 4-12 mm. widl; 

 heads rather numerous, about 25 mm. broad; involucre hemispheric, 8-10 ma. 

 high, its bracts glabrous, narrow, green, acute, imbricated in only 1 or 2 series, 

 nearly equal; rays numerous, about 8 mm. long, violet or pale purple; pappus 

 pale. In swamps and moist ground, Lab. to the N. W. Terr., south to northOT 

 N. Eng., Ont. and Mont. Summer. 



Aster longifolius villicaulis A.Gray. Stem densely white-villous ; leaves narrovly 

 linear-lanceolate, the midrib villous beneath; heads fewer, long-peduncled ; rays dark 

 violet. Northern Me. and N. B. 



43. Aster foliaceus Lindl. Leafy-bracted Aster. (I. F. f. 3775.) Stem 

 usually stout, sparingly pubescent in lines, 6-9 dm. high, branched above, the 

 branches ascending. Leaves rather thin, obiong-lanceolate, acute, entire, or with 

 a few small distant teeth, glabrous on both sides, very rough-margined, 5-10 cm. 

 long, 1-2.5 cm. wide, the upper all strongly clasping at the base, the lowest peti- 

 oled; heads corymbose-paniculate, numerous, 25 mm. broad or more; involucre 

 hemispheric, its bracts green, foliaceous, oblong, mucronate, the inner mostly 

 narrower and acute; rays about 30. violet. 8-IO mm. long; pappus nearly white; 



achenes pub-sent. Neb. to Mont and CaL August. 



44. Aster serlceus Vent. Western Silvery or Silky Aster. (I. F. f. 

 3776. ) Stem slender, paniculately or corymbosely branched, stiff, glabrous, leafy, 

 3 6 dm. high. Stem-I ile, with a broad base, oblong, entire, mucronate, 

 1 1 , „i. long, 4 in mm. wide, .-rcct or ascending, with a dense silvery-white silky 

 pubescence on both sides; basal and lowest leaves oblanceolate, narrowed into 

 margined petioles; heads numerous, about 35 mm. broad; involucre turbinate, its 



