A.t«boii.w] SYXGENESIA 469 



1 E. xAcnoriiTLiA, Cass. Stem mostly roughish-puhcscent ; leaves 

 cordate, and ovate, serrate, mostly scabrous above and hirsute beneath, 

 ndical ones very large, cordate, petiolate, cauline ones ovate, contracted 

 at base to a winged petiole, the uppermost ones sessile; involucre 

 roughish-pubescent, the leaflets elliptic-oblong, rather obtuse. JVees, 

 Jst.p. 140. 



Aster macrophyllus. L. WilUL J\Tx. Pers. Pursh, Beck, &c. 

 Jlso? A. divaricatus. Willd. Sp. 3. p % 2044, Pers. Syru 2. p. 446. 

 Jit. Keiv. 5. p. 00. Muhl. Catal. p. 75. 

 Largk-lkaved Eurtbja. 



Root perenni.il. Stem IS inches to 2 feet high, rather stout, somewhat angular 

 and striatc-sulcatc, mostly roughish-pubescent, sometimes nearly smooth, often 

 purple, corymboscly branched, the branches rigid, and, with the upper part of 

 the stem, often flexuose. Radical leaves 3 or 4 to S inches long, and 2 to 6 inches 

 wide, varying from roundish-cordate to cordate-oblong, acuminate, coarsely cren- 

 ate-serrate with mucronatc serratures, often very scabrous on the upper surface? 

 and hirsute beneath, sometimes nearly smooth and thinnish, the lobes at base 

 often large, and overlapping so as to close the sinus, petioles 3 to 6 or 8 inches 

 long; stem-leaves much smaller, ovate, and abruptly contracted at base to a 

 winged petiole (the lower ones often cordate, and on narrow petioles),— the upper- 

 most ones sessile. Heads of flowers rather large, in a spreading terminal corymb ; 

 involucre roughish-pubescent, the leaflets pubescent-ciliate ; rays white, or often 

 purplish. Akenes linear, about 3-ribbed, striate, sparsely pilose, finally nearly 

 smooth; pajfpiis reddish-tawny. 



Hub. Woodlands ; clearings, &c. frequent. Fl. August— Sept. Fr. Octo. 



Obs. There are 2 or 3 varieties of this ;— in one of which the leaves are thick- 

 ish, somewhat rugose and very scabrous,— in another thinner, and nearly smooth. 



2. E. COBT3CB08A, Cass. Stem smooth, dichotomously corymbose at 

 summit ; leaves cordate and ovate, conspicuously acuminate, sharply 

 serrate, smoothish, petiolate ; involucre smoothish, the leaflets linear- 

 oblong, obtuse, pubescent-ciliatc on the margin, the exterior ones ovate. 

 Jfees, Ast.p. 143. 

 Aster corymbosus. Ait. Willd. Pursh, Beck, &c. 



CORTXBOSE EURTBIA. 



Root perennial. Stem about 2 feet high, slender, terete, often flexuose, smooth, 

 sometimes purple, branched at summit, the branches somewhat dichotomous, and 

 forming a subfastigiatc corymb. Leaves^ to 4 or 5 inches long, and 1 to 2 or 2 and 

 a half inches wide, thinnish and nearly smooth,— the lower ones cordate, strongly 

 and unequally serrate, on naked petioles 1 to 2 inches long,— the upper ones ovate, 

 or ovate-lanceolate, on shorter petioles (which are sometimes margined),— ail acu- 

 minate, the lower ones remarkably so. Heads of flowers middle-sized, often 

 few, in a terminal corymb; branches more or less pubescent in lines; involucre 

 smoothish, the leaflets pubescent on the margin, the outer ones shorter, ovate, 

 and ovate-oblong, the inner ones narrow, sublinear, and almost wholly mem- 

 branaceous ; rays white. Akenes cuneate-linear, striate, sparsely pilose ; pappus 

 reddish-tawny. 



Hob. Dry open woodlands: frequent. Fl. July-August. /V.September. 



Obs. Kees von Esenbeck enumerates 2 or 3 other species as natives of the U. 

 States; but I suspect they will prove to be varieties of E. fnacrophylla. The ge- 

 nus, itself, is scarcely distinct from Aster. 



40 



