Asteraceae
White thistle
Cirsium hookerianum
- Family
- Asteraceae
- Genus
- Cirsium
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Common names
By language (1)
- English
- White thistle
Synonyms
- Carduus hookerianus A.Heller
- Carduus hookerianus var. hookerianus
- Carduus kelseyi Rydb.
- Cirsium hookerianum var. hookerianum
- Cirsium kelseyi Rydb.
- Cnicus hookerianus A.Gray
Flowers
- In flower
- June to August (from 342 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Canada: native, Lower 48 states: native
Photos
FlowerPhoto: Kallum McDonald, CC0, from iNaturalist 
FlowerPhoto: mfeaver, CC BY 4.0, from iNaturalist 
FlowerPhoto: North Ross, CC0, from iNaturalist 
FlowerPhoto: Carolyn Bahl, CC0, from iNaturalist 
FlowerPhoto: Megan Blackmore, CC0, from iNaturalist 
Photo: Dean Wm. Taylor, CC BY 2.0, from Wikimedia Commons 
Photo: Seig, CC BY 4.0, from iNaturalist 
Photo: Thiswasnotmyintention, CC BY 4.0, from Wikimedia Commons 
Photo: Peter L Achuff, CC BY 4.0, from iNaturalist 
Photo: Caleb Catto, CC BY 4.0, from iNaturalist 
Photo: Rob.id, CC BY 4.0, from iNaturalist
More in Cirsium
- Creeping thistleCirsium arvenseAsteraceae
- Spear thistleCirsium vulgareAsteraceae
- Marsh thistleCirsium palustreAsteraceae
- Cabbage thistleCirsium oleraceumAsteraceae
- Dwarf thistleCirsium acauleAsteraceae
- Woolly thistleCirsium eriophorumAsteraceae
- Melancholy thistleCirsium heterophyllumAsteraceae
- Cirsium rivulareAsteraceae
- Meadow thistleCirsium dissectumAsteraceae
- Yellow melancholy thistleCirsium erisithalesAsteraceae
- Cirsium spinosissimumAsteraceae
- Cirsium tuberosumAsteraceae
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.