Eupatorium altissimum Linnaeus. Common name: Tall Thoroughwort. Phenology: Late Aug-Nov. Habitat: Woodlands, old fields, woodland borders, and openings over mafic rocks (such as diabase) or calcareous rocks (such as limestone and calcareous sandstone). Distribution: CT, NY, QC, MN, and NE, south to Panhandle FL and TX, primarily in the midwest, especially on limestone substrates, and uncommon east of the mountains.
Origin/Endemic status: Native
Synonymy ⓘ: = F, G, GrPl, Il, K4, Mi, NcTx, NE, NY, Oh3, Pa, RAB, S, Tn, Tx, Va, W, WV; = n/a — Tat; < Eupatorium altissimum L. — Ar, C, Fl7, FNA21, SE1, WH3; Eupatorium altissimum L. Basionym: Eupatorium altissimum L. 1753
Links to other floras: < Eupatorium altissimum - FNA21
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Heliophily ⓘ: 8
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© Gary P. Fleming | Original Image ⭷
© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Erik Danielson source | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© Gary P. Fleming | Original Image ⭷
© Erik Danielson source | Original Image ⭷Feedback
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