Aster firmus Nees
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Similar to no. 5 [Aster puniceus L.], but colonial by long creeping rhizomes; stem and branches puberulent in lines above, glabrous or sparingly hispid below the infl; lvs more crowded, especially upwards, firmer, often shining, entire or nearly so; invol bracts often less attenuate; rays blue or lavender (mostly rather pale) to occasionally white; 2n=16, 32. Moist places; W.Va. and w. N.Y. to Minn., S.D., and s. Mo. (A. lucidulus)