Symphyotrichum undulatum  (Aster undulatus) clasping heart-leaved aster Asteraceae ASUN; Bx, pb (DeCandido 2001);

  

Aster undulatus.ct-botanical-society.org.Janet Novak

Aster undulatus.ct-botanical-society.org.© 2001.Janet Novak

Symphyotrichum undulatum perennial 30-120 cm tall from a branched root crown, usually densely fine-hairy. 

Leaves alternate, 3.5-14 cm long, 1.5-7 cm wide, variable, lower leaves with lobed base, stalked, base of stalk usually wide, lobed and clasping stem, margins wavy, upper leaves often stalkless, clasping at base. 

Flowers: rays blue-lilac, 10-20, bracteate base of flower head 0.4-0.7 cm long, bracts overlapping, tips sharply pointed, Aug.-Nov. 

Fruit dry, 1-seeded, achene, with tuft of hairs (pappus), wind dispersed. 

Wetland status: UPL. 

Frequency in NYC: Very infrequent. 

Origin: Native. 

Habitat: Dry, open woods.