Class XIX. Order II. 313 



er ones oblong-heart shaped, with winged petioles, up- 

 per ones oval lanceolate, clasping ; stem hipid, pani- 

 cled ; branchlets leafy, one flowered, tending to one 

 side. 



Syn. JISTER UNDULATUS. Jlit. 



This species is remarkable for the gradation of its leaves from 

 one distinct form to another. Stem pubescent, rough. Lower 

 leaves oblong-heart shaped, pointed, serrate, downy underneath, 

 supported on long petioles, which are winged or dilated at the 

 base. Middle leaves panduriform, clasping. Upper leaves ovate 

 or lanceolate, nearly entire, clasping. Panicle lax, with slender 

 branches, covered with small leaves. Peduncles generally, but 

 not always, inclining one way. Flowers blue. August, Septem- 

 ber. Perennial. 



ASTER LJEVIS. Willd. Smooth Aster. 



Leaves somewhat clasping, remote, oblong, entire, 

 shining, those of the root subserrate ; branches simple, 

 one flowered ; calyx imbricated ; the leafets somewhat 

 wedge-shaped, acute, thickened at tip ; stem smooth, 

 angular. 



A smooth plant throughout, with somewhat fleshy leaves and 

 large purple flowers. In wet grounds. September, October. 

 Perennial. 



ASTER CORNIFOLIUS. Muhl. Cornel leaved Aster. 



Leaves oblong-ovate, acuminate, entire, petioled, 

 smooth, rough on the edge ; stem smooth, panicle few 

 flowered ; calyxes somew hat imbricated. Willd. 



A pretty early species. Stem erect, glabrous. Leaves on 

 very short petioles, narrow-oval, acute at base, acuminated at 

 point, nearly smooth, the margin entire, rough, and slightly cili- 

 ated, the under surface pale. Panicle few flowered. Flowers 

 white. Found in woods. July, August. Perennial. 



ASTER CORDIFOLIUS. L. Heart leaved Aster. 



Leaves heart-shaped, hairy beneath, sharply serrate : 



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