CLASS XIX. ORDER II. 335 



Aster cordifolius. L. Heart leaved Aster. 



Leaves heart shaped, hairy beneath, sharply ser- 

 rate; petioles winged; stem panicled, hairy; calyxes 

 locsely imbricate. Willd. 



Stem erect, somewhat flexuous, in some plants a little hairy, 

 in others quite smooth. Leaves heart shaped, with a deep sinus, 

 acutely serrate, acuminate, downy underneath. Petioles with a 

 membranous edge. Panicle terminal, many flowered. Flowers 

 small, purplish white, the disc varying from red to yellow. — 

 Woods. — September. — Perennial. 



Aster corymbosijs. Ait. Corymhed Aster. 



Leaves ovate, sharply serrate, acuminate, the lower 

 ones heart shaped, petioled, naked; stem ending in a 

 fastigiate corymb ; branches hairy; calyxes oblong, 

 imbricate, its scales closely pressed. Willd. 

 Syn. EuRTBiA corymbosa. Hooker. 



A pretty large, white, flowering plant. Stem smooth, frequently 

 of a dark reddish color. Lower leaves heart shaped, petioled, 

 smooth, toothed ; upper ones ovate, acuminate, subsessile. Flow- 

 ers white, in a large, flat topped corymb, the branches of which 

 are slightly pubescent. — Woods and shades, Roxbury, Brookline. 

 — August. — Perennial. 



Aster macrophyllus. L. Large havcd Aster. 



Leaves ovate, petioled, serrate ; the upper ones 

 ovate-heart shaped, sessile; lower ones heart shaped, 

 petioled ; petioles somewhat margined ; stem branch- 

 ing, diffuse; calyxes cylindrical, closely imbricate. 

 Willd. 

 Syn. EuRYBiA macrophylla. Hooker. 



The root leaves are uncommonly large, heart shaped, serrate 

 and acute, rather smooth. Stetn furrowed, scarcely rough. L^p- 

 per leaves sessile, ovate, a little hearted at base. Scales of the 

 calyx closely appressed. Ray pale blue. — Woods. — September. 

 — Perennial. 



