Symphyotrichum urophyllum (Lindl.) G.L. Nesom - White Arrow-leaved Aster


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Symphyotrichum urophyllum - (image 1 of 4)



Family: Asteraceae


Open woods, fields, roadsides.




Southwest VT to MN, south to GA, western FL, MS, and MO.


Herbaceous perennial from a branched caudex or short rhizome; stems 40-120 cm, more or less glabrous below the inflorescence or villous-puberulent in lines; leaves thick, shallowly toothed, the lowest ones ovate or more often lance-ovate, acuminate, cordate, long petiolate, those above progressively less cordate or abruptly narrowed to a shortly, broadly winged petiole, the upper often tapering and sessile; inflorescence paniculiform, elongate, with ascending, narrowly bracteate branches; heads often numerous, on narrowly bracteate peduncles rarely over 1 cm and usually under 5 mm, thus appearing crowded; involucre 4-6 mm; involucral bracts glabrous though the margins sometimes ciliolate, slender and long-pointed, with elongate, narrow green tip; rays 8-20, usually white, 4-8 mm.


Flowers August to October

Wetland Indicator: NA

In the past this species has been considered synonymous with S. sagittifolium which may or may not be a distinct taxon (the type specimen is widely accepted to be of S. cordifolium or a hybrid).


Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY




Michael Hough 2018