Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
Included in Aster sagittifolius in Michigan Flora.
A plant of sandy oak savannas, open areas in dry oak forests; also along sandy roadsides and powerlines through oaks savannas.
Either rare or overlooked; all but the Barry Co. specimens are old. This species resembles coarse, large individuals of Symphyotrichum urophyllum, with similar ascending panicle branches forming a relatively narrowly pyramidal inflorescence, but with longer blue rays of the same color as in S. oolentangiense. Plants are often somewhat more pubescent on the upper stem and inflorescence axis than S. urophyllum, which is glabrate. Well pressed and flattened rays are needed to measure the dimensions. The disk is also larger and the heads are typically 2–2.5 cm in diameter when alive, including the rays. In S. urophyllum, the heads are typically well under 2 cm across, often only 1.2–1.5 cm.