Symphyotrichum praealtum var. praealtum
Family: Asteraceae
willowleaf aster
[Aster caerulescens ,  more]
Symphyotrichum praealtum var. praealtum image
Much like no. 12 [Aster lanceolatus Willd.]; lvs thick and firm, conspicuously reticulate beneath with nearly isodiametric areolae, entire or nearly so, scabrous to subglabrous above, glabrous or scabrous-puberulent beneath, the main ones 7-13 cm נ8-18 mm; invol 5-7(-8) mm; rays 6-15 mm, bluish-purple or rarely white; lobes of the disk-cors comprising 17-25% of the limb; 2n=32, 64. Moist low ground; Mich. to Ga. w. to Neb., s. Ariz., and n. Mex.; Irregularly and rarely e. to Mass., N.Y., N.J., and Md. (A. salicifolius, a preoccupied name) The otherwise more western var. nebraskensis (Britton) Wiegand, with the stem and often also the lower lf-surfaces more uniformly and conspicuously spreading-puberulent, has been reported from Io. (A. nebraskensis; ? A. woldeni)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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