Asteraceae

Eaton's thistle

Cirsium eatonii (A.Gray) B.L.Rob.

Family: Asteraceae
Genus: Cirsium

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Eaton's thistle (Cirsium eatonii) — FlowerPhoto: Daughter Dad, CC BY 4.0, from iNaturalist

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Common names

By language (1)

English: Eaton's thistle

Synonyms

Carduus leiocarpus A.Heller
Cirsium eatonii var. eatonii
Cirsium eatonii var. harrisonii S.L.Welsh
Cirsium eriocephalum var. leiocephalum D.C.Eaton
Cnicus eatonii A.Gray

Flowers

In flower: July to September (from 119 flowering iNaturalist observations worldwide)

Characteristics

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

Photos

FlowerPhoto: Daughter Dad, CC BY 4.0, from iNaturalist
FlowerPhoto: Parker James Lloyd, CC BY 4.0, from iNaturalist
FlowerPhoto: Daughter Dad, CC BY 4.0, from iNaturalist
Photo: Stan Shebs, CC BY-SA 3.0, from Wikimedia Commons
Photo: Will Pearce, CC BY 4.0, from iNaturalist
Photo: Matt Lavin, CC BY-SA 2.0, from Wikimedia Commons
Photo: Parker James Lloyd, CC BY 4.0, from iNaturalist
Photo: Matt Lavin, CC BY-SA 2.0, from Wikimedia Commons
Photo: Matt Lavin, CC BY-SA 2.0, from Wikimedia Commons
Photo: Matt Lavin, CC BY-SA 2.0, from Wikimedia Commons
Photo: Matt Lavin, CC BY-SA 2.0, from Wikimedia Commons
Photo: Matt Lavin, CC BY-SA 2.0, from Wikimedia Commons

More in Cirsium

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.