COMPOSITAE. 963 



lanceolate, acuminate, narrowed to a sessile base, 7-15 cm. long, 3-12 mm. wide, 

 glabrous or nearly so on both sides, commonly thin, sharply serrate in the middle 

 with low teeth, or sometimes entire; heads very numerous, racemose but not 

 secund on the branches, 10-16 mm. broad; involucre hemispheric to broadly tur- 

 binate, 4-6 mm. high, its bracts linear, acute, appressed, green-tipped, imbricated 

 in 4 or 5 series; rays white or nearly so, numerous, 4-6 mm. long; pappus white; 

 achenes minutely pubescent. In fields and swamps, Ont. to Va., west to the N. W. 

 Terr., 111. and Minn. Extends to Fla. Aug. -Oct. 



67. Aster Faxoni Porter. Faxon's Aster. (I. F. f. 3796.) Glabrous 

 throughout; stem paniculately or corymbosely branched, rather stout, 6-15 dm. 

 high. Stem-leaves lanceolate or linear-lanceolate, acute or acuminate, narrowed 

 to a sessile base, or the lower into margined petioles, entire or nearly so, firm, 

 5-12 cm. long, 4-8 mm. wide, those of the branches gradually smaller; basal 

 leaves oblong to spatulate, obtuse, dentate; heads not very numerous, 12-18 mm. 

 broad; involucre hemispheric, nearly 8 mm. high, its bracts linear- lanceolate, 

 acute or subulate, green-tipped or green on the back, imbricated in about 3 series, 

 the outer shorter; rays bright white, 6-8 mm. long, numerous; pappus white; 

 achenes minutely pubescent. On moist cliffs, Vt. and Mass. to Penn., west to 

 Wis.(?), south to N. Car. Aug.-Sept. 



68. Aster ericoides L. White Heath Aster. Frost-weed Aster. 

 (I. F. f. 3797.) Stem glabrous or very nearly so, paniculately branched, usually 

 bushy, 3-9 dm. high, the branches racemose, and the branchlets often somewhat 

 secund. Leaves firm or rigid, the basal ones spatulate, obtuse, dentate, narrowed 

 into margined petioles, glabrous or ciliate; stem-leaves narrowly linear, acute, en- 

 tire, 2-7 cm. long, 2-6 mm. wide, those of the branches linear-subulate, numerous; 

 heads usually very numerous, 8- 12 mm. broad; involucre campanulate to hemi- 

 spheric, its bracts coriaceous, lanceolate or linear-lanceolate, abruptly acute or 

 acuminate, green-tipped, imbricated in about 3 series; rays 15-25, white, or tinged 

 with rose; pappus white; achenes finely pubescent. In dry soil, Me. and Ont. to 

 Fla., west to Wis. and Ky. Sept. -Dec. 



Aster ericoides pi!6sus (Willd.) Porter. Stem, branches and often the leaves villous- 

 hirsute or hispid ; leaves linear-lanceolate. W. Ont. to Penn. and Ga., west to Minn, and 

 Mo. 



Aster ericoides platyphyllus T. & G. Densely villous-hirsute: stem-leaves lanceolate 

 or oblong-lanceolate, 2-5 cm. long, 8-25 mm. wide. Ind. to N. Car. and Ga. 



Aster ericoides depauper&tus Porter. Glabrous, very slender, 15-30 cm. high; stem- 

 leaves and those of the branches linear or subulate. S. Penn. and W. Va. 



Aster ericoides Rdndi Britton. Low, stout, glabrous, seldom over 3 dm. high, corym- 

 bosely or somewhat racemosely branched above, often bushy; stem-leaves elongated, 

 sometimes 6 mm. wide; basal leaves spatulate, petioled, entire; heads numerous, larger 

 than in the type, sometimes over 25 mm. broad; rays white to violet; bracts of the in- 

 volucre greener than in the type. Perhaps a distinct species. Mt. Desert Island, Me. 



Aster ericoides parviceps Burgess. More or less pilose; stem strict, erect, about 3 

 dm. high, usually bushy, branched above, the branches mostly short; leaves narrowly 

 linear, ascending, with short leafy branches in their axils ; heads numerous, crowded, 

 6-8 mm. broad, somewhat secund; involucre 1-4 mm. high; leaves of the branches reduced 

 to small scales. Prairies, 111. and Mo. 



69. Aster Pringlei (A. Gray.) Britton. Pringle's Aster. (IF. f. 3798.) 

 Stem very slender, glabrous, simple, or with few or numerous slender ascending 

 branches, not bushy, 1.5-6 dm. high. Basal leaves lanceolate, oblong or oblanceo- 

 late. 5-15 cm. long, 4-12 mm. wide, entire, or slightly toothed, ciliate and some- 

 times a little pubescent, at least on the slender petioles, which are often as long as 

 the blades; stem-leaves narrowly linear, those of the branches small and subulate; 

 heads as large as those oiA. ericoides, or commonly smaller, usually fewer, solitary 

 at the ends of the branches and branchlets; bracts of the campanulate involucre 

 with short green tips; rays white. On banks, especially in rocky places, Me. to 

 Mass., Vt. and Wis. Aug. -Oct. 



a.¥. 



f. 3799.) Stem puberulent or nearly glabrous, slender, divergently branched, 

 3-15 dm. high. Basal leaves ovate, slender-petioled; stem-leaves broadly lanceo- 

 late or oblong-lanceolate, mostly acuminate, serrate, 5-12 cm. long, 12-25 mm « 

 wide, those of the branches smaller, oblong or linear-oblong; heads 6-iomm. broad, 



