Asteraceae

Lateflowering thoroughwort

Eupatorium serotinum Michx.

Family: Asteraceae
Genus: Eupatorium

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Lateflowering thoroughwort (Eupatorium serotinum) — FlowerPhoto: Charlie O'Brien, CC0, from iNaturalist

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Common names

By language (1)

English: Lateflowering thoroughwort

Synonyms

Eupatorium ambiguum Hook.
Eupatorium serotinum var. serotinum
Uncasia serotina Greene

Flowers

In flower: August to October (from 2,584 flowering iNaturalist observations worldwide)

Characteristics

Growth habit: Forb/herb
Lifespan: Perennial
In the US and Canada: Canada: introduced, Lower 48 states: native

Photos

FlowerPhoto: Charlie O'Brien, CC0, from iNaturalist
FlowerPhoto: Sandy Wolkenberg, CC BY 4.0, from iNaturalist
FlowerPhoto: Allen Browne, CC0, from iNaturalist
FlowerPhoto: Michael J. Papay, CC BY 4.0, from iNaturalist
FlowerPhoto: Michael, CC0, from iNaturalist
Photo: Bob Peterson from North Palm Beach, Florida, Planet Earth!, CC BY-SA 2.0, from Wikimedia Commons
Photo: Joshua Hughes Hughes, CC BY-SA 4.0, from Pl@ntNet via GBIF
Photo: Frank Mayfield, CC BY-SA 2.0, from Wikimedia Commons
Photo: Eylisia, CC BY-SA 4.0, from Pl@ntNet via GBIF
Photo: zancat, CC BY 4.0, from iNaturalist
Photo: Fritzflohrreynolds, CC BY-SA 3.0, from Wikimedia Commons
Photo: jray86, CC BY-SA 4.0, from Pl@ntNet via GBIF

More in Eupatorium

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.