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


 

|  back  | forward |

Symphyotrichum urophyllum - (image 1 of 4)

 

Taxonomy

Family: Asteraceae

Habitat

Open woods, fields, roadsides.

Associates

 

Distribution

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

Morphology

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.

Notes

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).

References

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

 


Home

 

Michael Hough 2018