Asteraceae
Slough thistle
Cirsium crassicaule
- Family
- Asteraceae
- Genus
- Cirsium
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Common names
By language (1)
- English
- Slough thistle
Synonyms
- Carduus crassicaulis Greene
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Annual
- In the US and Canada
- Lower 48 states: native
Photos
Photo: Trevor Van Loon, CC BY 4.0, from Wikimedia Commons 
Photo: Trevor Van Loon, CC BY 4.0, from Wikimedia Commons
More in Cirsium
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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.