Eurybia macrophylla (Linnaeus) Cassini. Subgenus: Eurybia. Section: Eurybia. Big-leaved Aster. Phen: Late Jul-Sep. Hab: Moist to dryish forests, in NC mostly at moderate to high elevations, particularly in red oak forests on ridgetops. Dist: NB and QC west to MN, south to PA, MD, VA, NC, nw. SC, ne. GA, e. TN, and IN; disjunct in scattered sites in MO and nw. AR. Known in SC from at least Greenville County (S. Tessel, pers. comm., 2023).

Origin/Endemic status: Native

Taxonomy Comments: Aster macrophyllus var. ianthinus [= Aster multiformis] is sometimes recognized. It is alleged to differ in having the stipitate glands of the pedicels with minute heads (vs. broadly capitate), the leaves thin in texture and only slightly scabrous (vs. thick in texture and strongly scabrous). Refer to Fernald (1950) for descriptions of other recognized varieties and an associated key. Eurybia macrophylla is octoploid (2n=72).

Synonymy: = Ar, FNA20, Il, K1, K3, K4, Mi, NE, NY, Pa, Tn, Va, Nesom (1994b); = Aster macrophyllus L. – C, G, Oh3, RAB, SE1, Tat, W, Lamboy (1987); > Aster macrophyllus L. – S; > Aster macrophyllus L. var. apricensis E.S.Burgess – F; > Aster macrophyllus L. var. excelsior E.S.Burgess – F, WV; > Aster macrophyllus L. var. ianthinus (E.S.Burgess) Fernald – F, WV; > Aster macrophyllus L. var. macrophyllus – F, WV; > Aster macrophyllus L. var. pinguifolius E.S.Burgess – F; > Aster macrophyllus L. var. pinquifolius E.S.Burgess – WV, misspelling; > Aster macrophyllus L. var. sejunctus E.S.Burgess – F; > Aster macrophyllus L. var. velutinus E.S.Burgess – F, WV; > Aster multiformis E.S.Burgess – S; > Aster riciniatus E.S.Burgess – S

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: UPL
• Eastern Mountains and Piedmont: UPL
• Great Plains: FACU
• Midwest: FACU
• Northcentral & Northeast: UPL

Heliophily: 4