332 CLASS XIX. ORDER II. 



Aster dumosus. L. Bushy Aster. 



Leaves linear, glabrous ; those of the branches very 

 short ; branches panacled ; calyx cylindrical, closely 

 imbricate. 



A polymorphous white Aster, with a yellow disc, which turns 

 brown, and the ray sometimes approaching to violet. 



Aster diffusus. Ait. Spreading Aster. 



Leaves elliptic-lanceolate, serrate, glabrous ; 

 branches spreading ; calyxes imbricate, stem pubes- 

 cent. Ait. 



A common, bushy Aster, with a profusion of white flowers. 

 Stem branching, slightly pubescent. Branches numerous, long, 

 and slender, spreading, leafy, many flowered. Leaves lanceo- 

 late, rough at the edge, slightly serrate in the middle ; those of 

 the branches small, entire. Flowers small, very numerous, 

 somewhat racemed, white. — Woods and road sides. — August, 

 September. — Perennial. 



Aster conyzoidks. Willd. Conyza Aster, 



Leaves oblong, three nerved, narrowed at base, 

 acute, the upper ones sessile, nearly entire, the lower 

 ones petioled, serrate ; stem simple, corymbed at top ; 

 calyx cylindrical, squarose; rays five, short. 



Stem mostly smooth. Lower leaves frequently obovate or 

 spatulate. Calyx of whitish scales with green tips as in A. soli- 

 dagineus. Ray white. — Woods. — July, August. — Perennial. 



Aster acuminatus. 3Ix. Acuminate Aster. 



Leaves broad-lanceolate, narrowed and entire at 

 bottom, serrate, acuminate ; stem simple, flexuous, 

 angular, panicle corymbose, divaricately dichotomous; 

 scales of the calyx lax, linear, shorter than the disc. 



Stem rough, pubescent. Leaves shortly petioled, narrowed 

 for a great length at base, the edges furnished with remote, 

 divergent teeth, the point long, acuminate. Corymb terminal, 



