Much like no. 1 [Aronia arbutifolia (L.) Elliott], but the twigs, pedicels, and lower surfaces of the lvs generally glabrous or nearly so, varying to seldom somewhat more evidently hairy; lvs not turning bright red; fr black, ripening earlier and soon withering, but sometimes persistent; 2n=34. Similar habitats; Nf. and s. Lab. to n. Ga. and Ala., w. to e. Minn., ne. Io., and se. Mo., widely overlapping the range of no. 1, especially northward, but wanting from the coastal plain and adjacent piedmont. May-July, fr Aug.-Oct. (Pyrus m.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.