COMPOSITAE. 961 



rigid, 5-15 cm. long, 4-8 mm. wide, mostly i-nerved, acute, the lower part com- 

 monly sheathing the stem; heads few or several, racemose or paniculate, 3.55 cm. 

 broad; involucre broadly campanulate or hemispheric, its bracts imbricated in about 

 5 series, foliaceous, ciliate, the outer lanceolate, acute, the inner oblong or spatu- 

 late; rays 20-30, deep violet, 10-14 mm. long, pappus tawny; achenes 8-io-nerved, 

 glabrous or nearly so. Swamps, Kans. and Mo. to Tex., N. C. and Fla. Aug.-Oct. 



58. Aster nemoraiis Ait. BOG ASTER. (I. F. f. 3788.) Stem puberulent, 

 slender, simple, or corymbosely branched above, 1.5-6 dm. high. Leaves sessile, 

 membranous, oblong-lanceolate or linear-oblong, acute at each end, pubescent or 

 puberulent on both sides, dentate or entire, 2-5 cm. long. 3-8 mm. wide, margins 

 often re volute; heads several, or solitary, 25-35 mm - broad, the peduncles slender; 

 involucre hemispheric, its bracts appressed, linear-subulate, acute or acuminate, 

 imbricated in alxmt 3 series; rays 15-25, light violet-purple to rose-pink; achenes 

 glandular-pubescent; pappus white. In sandy bogs, N. J. to northern N. Y., Ont., 

 Newf. and iiudson Bay. Aug. -Sept. 



Aster nemorilis Blakei Porter. Stems 3-7 dm. high, ascending, leafy from the 

 base; leaves 5-10 cm. long, 10-25 mm. wide, oblong-lanceolate, remotely and sharply 

 dentate, or nearly entire-, heads rather few, sometimes solitary. Me., N. H. and north- 

 ern N. Y. Forms; resemble the following species. 



59. Aster aciiminatus Michx. WHORLED OR MOUNTAIN ASTER. (I. F. f. 

 3789.) Stem pubescent or puberulent. zigzag, corymbosely branched, often leafless 

 below. 3-9 dm. high. Leaves thin, broadly oblong, acuminate at the apex, nar- 

 rowed to a somewhat cuneate sessile base, sharply and coarsely dentate, pinnately 

 veined, glabrous or puoescent above, pubescent at least on the veins beneath, 7-15 

 cm. long, 1-4 cm. wide, often approximate above, and appearing whorled; heads 

 several or numerous, 25-37 mm. broad; involucre nearly hemispheric, its bracts 

 subulate-linear, acuminate, the outer much shorter; rays 12-18. narrow. 1216 mm. 

 long, white or purplish; pappus soft, fine, nearly white; achenes pubescent. 

 Moist woods, Lab. to Ont., western I 1 *!. Y., and in the mountains to Ga. July-Oct. 



60. Aster ptarmicoides (Nees) T. & G. UPLAND WHITE ASTER. (I. F. f. 

 3790.) Stems tufted, slender, rigid, usually rough above, corymbosely branched 

 near the summit, 3-6 dm. high. Leaves linear-lanceolate, 3-ribbed, entire, or 

 with a few distant teeth, firm, shining, rough-margined or ciliate, sometimes sca- 

 brous, acute, narrowed to a sessile base, or the lower petioled, the lowest and basal 

 ones 7-15 cm. long, 4-8 mm, wide, the upper smaller, those of the branches linear- 

 subulate; heads not numerous, 16-2 S mm. broad, terminating the branches of the 

 corymb; involucre nearly hemispheric, 4-6 mm. high, its bracts linear-oblong, ob- 

 tuse, appressed, nearly glabrous, green, imbricated in about 4 series; rays 10-20, 

 snow-white, 6-8 mm. long; pappus white; achenes glabrous. In dry or rocky 

 *>il, Mass., Vt. and Ont., to the N. W. Terr., 111., Mo. and Colo. July-Sept. 



Aster ptarmicoides lutdscens (Hook.) A. Gray. Rays pale yellow, short; involucre 

 narrower. Northern 111, to the N. W. Terr. 



61. Aster dumosus L. BUSHY ASTER. RICE BUTTON ASTER. (I. F. f. 

 3791.) Glabrous or very nearly so throughout, paniculately much branched, 3-9 

 dm. high. Leaves firm, those of the stem linear or linear-lanceolate, entire, acute, 

 or obtusish, 2-7 cm. long, 3-9 mm. wide, roughish-margined, often reflexed, those 

 of the branches very numerous, small and bract like, the basal ones spatulate, 

 dentate; heads 8-14 mm. broad, terminating the usually divergent slender branches 

 and branchlets, usually numerous; involucre broadly campanulute, its bracts linear- 

 subulate, obtuse or acutish, appressed. imbricated in about 4 series, green-tipped, 

 rays 15-30, white to pale violet, 4 mm. long, pappus white; achenes minutely 

 pubescent. Sandy soil, Me. to western N. Y., Ont., Fla., La. and Mo. Aug.-Oct. 



Aster dum&sus coridifblius (Michx.) T. & G. More rigid and stouter; branchlets 

 elongated; bracts of the involucre coriaceous: leaves of the branches small and numer- 

 ous, very close, divergent. Pine-barrens, Martha's Vineyard to Fla. 



Aster dumbsus strictior T. & G. Stem sparingly branched, the branches ascending, 

 terminated by rather larger heads ; leaves sessile by a broad ba^e, acuminate, mostly 

 quite entire. Swamps, Mass, to N. J., Penn. and Md. 



62. Aster Gravesii Burgess, n.sp. GRAVES' ASTER. Glabrous; stem slender, 

 6 dm. high or more. Stem-leaves oblong-lanceolate, entire, firm, sessile, or the 



