474 ; SYNGEXESIA [Asteroid** 



volucrc somewhat loosely imbricate, the leaflets linear-lanceolate, rather 



obtuse. Hook. Am. 2. />. 23. 



Also, D. umbellatus. Hook. Am. 2. p. 22. 



Aster amygdalinus. Mr, Pert, Pursh, Torr, Beck, &c. 



A. umbellatus. Ait. Jt'ilUL Mukl. Bart. Bigel. &c. 



Chrysopsis amygdalina. JWutt. Gen* 2. p. 153. 



Doellingeria amygdalina. +Yees, Ast. p. 179. 



Also j D. umbellata. jYees, Ast. p. 178. 



Am TGI) ALUS-LIKE DlPLOPAPPUB. 



Root perennial, Stem 2 to 4 feet high, angular-striate, smooth, or sometimes 

 scabrous on the angles, often purplish, branched at summit, the branches corym- 

 bose-fabti^iate. Leaves an inch and hall' to 1 inches long, and 1 third of an inch 

 lo an inch wide, lanceolate and lance-oblong, acuminate, smooth beneath, som c . 

 what scabrous above, and especially along the margin, which isentire and slightly 

 rcvolutc, narrowed at base to a very short petiole. Hurls of flowers middle- 

 sized, often numerous, in a level-topped corymb; branches angular and more or 

 less scabrous ; peduncles slender, scabrous-pul escent, naked, or with a Aw 

 small subulate-lanceolate bracts ; involucre slightly pubescent, the leaflets linear- 

 lanceolate, rathor obtuse, with a narrow membranaceous ciliate margin ; >«»/« 

 about 12, white, orochroleucous ; disk yellowish. Akenes 3or o-rihbed, somewhat 

 hirsute ; jxippus whitish, or sometimes reddish-tawny, the outer series shori, the 

 hairs of the inner one slightly thickened at apex. 



Hab. Low grounds ; moist thickets, &c. frequent. Ft. Aug— Sept. Pr. Octo. 



Obs. The angles, or ridges, on the stem are often more or less s< abrous, nnd 

 the leaves vary a little ; but it seems to be refining entirely too much, to make 

 two species of this,— as proposed by Necs von Esenbeck. 



3. D. cornifolius, Less. Stem terete, smoothish, subnVxuose, spa- 

 ringly and dichotomously corymbose-paniculate at summit; haves 

 elliptic, acuminate, sub-cunealc at base, subsessile, entire, ciliate-hir- 

 sute on the margin, hairy on the veins beneath ; involucre imbricate, 

 the leaflets oblong-lanceolate, rather obtuse, ciliate. 



Aster in firm us. Jktx. Am. 2. p. 109, 



A, humilis. Willd. Sp. 3. /;. 2038. Pers. Syn. 2. p. 445. Punk, 



Am. 2. p. 548. Ell. Sh. 2. p. 3G6. Torr. Comp.p. 300. Flovul. Cestv. 



p. 90. Lindl. Ency. p. 708. Beck, Hot. p. 188. Eat. Man. p. 38. 



A. cornifolius. Muhl. Catal. p. 74. Bart. Phil. 2. p. 114. Bigel. 



Boat. p. 313. Also, Willd. Sp. 3. p. 2039. Pers. I. c. Pursh,). c. 



Lindl. I. c. Eat. I. c. 



Chrysopsis humilis. Nutt. Gen. 2. p. 153. 



Doellingeria cornifolia. Jfees, Ast.p. 181. 



CORNUS-LKAVED DlTLOrAPPUS. 



Root perennial. Stem I to 2 feet high, slender, terete, striate, smooth, or spa- 

 ringly pilose in decurrent lines from the base of the leaves, often ftexoose, Leaves 

 2 to 4 inches long, and 2 thirds of an inch to 2 inches wide, elliptic, or subrhom- 

 boid-oval, acuminate, entire, somewhat cuneate at base (upper ones lanceolate, 

 lower ones often spatulate, obtuse), subsessile, reticulately and rather promi- 

 nently veined, nearly smooth above, routhly pilose on the margin, midiiband 

 yeins beneath. Heads of flowers middle-sized, generally few, corymbose-panic* 

 ulate, often in pairs, or the branches dichototnous ; branches and peduncles j>u- 



