Symphyotrichum cordifolium (Aster cordifolius) heart-leaved aster Asteraceae ASCO2; Bx, br, pb, sf, wv (Yost et al. 1991); NY, ct, hb, n, rv; Q, cu, f; R (DeCandido 2001);

  

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Symphyotrichum cordifolium (Aster cordifolius; common heart-leaved aster) MBGargiullo. 2016-10-15

Symphyotrichum cordifolium is a perennial herb 20-120 cm. tall from a short rhizome; stem usually hairless below inflorescence. 

Leaves alternate heart-shaped, deeply, sharply toothed, to 15 cm long, 7 cm wide, rough above esp. near margins, sometimes hairy below, tip long-pointed, base deeply lobed, stalks usually not winged. 

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Symphyotrichum cordifolius (Aster cordifolia; heart-leaved-aster).MBGargiullo.10/2015 close-up

Flowers in small, daisy-like heads, rays blue-white to pale blue, 8-20, 0.5-1 cm long, disk flowers yellow, becoming dark purplish, bracteate base of flower head 0.3-0.6 cm, bracts narrow, overlapping, appressed, green with dark tips (see Asteraceae); inflorescence branched, pyramidal, many-flowered, with small leafy bracts on flower stalks; blooming and fruiting, Sept.-Oct.; insect pollinated. 

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

Wetland status: UPL. 

Frequency in NYC: Occasional. 

Origin: Native. 

Habitat: Upland woodlands, partial shade, edges, drought and shade tolerant. 

Notes: Similar to white wood aster but A. cordifolius blooms later and has smaller, more numerous flowers that are blue or bluish-white, on a larger inflorescence than those of A. divaricatus. Leaves of both species virtually identical early in season.