Asteraceae
Rough cocklebur
Xanthium strumarium
- Family
- Asteraceae
- Genus
- Xanthium
Pet and kid safety: not checked yet. Check pet-safe plants
Is yours looking unwell? Scan your plant — free
Common names
By language (1)
- English
- Rough cocklebur
Flowers
- In flower
- August to September (from 171 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Annual
- In the US and Canada
- Canada: native, Hawaii: introduced, Lower 48 states: native, Pacific Basin: introduced, Puerto Rico: native, U.S. Virgin Islands: native
Photos
FlowerPhoto: Anne Parsons, CC0, from iNaturalist 
FlowerPhoto: Dinesh Valke, CC BY-SA 4.0, from iNaturalist 
FlowerPhoto: Cheng-Tao Lin, CC BY 4.0, from iNaturalist 
FlowerPhoto: Dinesh Valke, CC BY-SA 4.0, from iNaturalist 
Photo: Corey Koala, CC BY 4.0, from iNaturalist 
Photo: Shizhao, CC BY-SA 2.5, from Wikimedia Commons 
Photo: Lyrae, CC BY 4.0, from iNaturalist 
Photo: Olivier Pichard, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Wynand Uys, CC BY 4.0, from iNaturalist 
Photo: Ziegler175, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Brandon McCracken, CC BY 4.0, from iNaturalist 
Photo: Jim Morefield from Nevada, USA, CC BY-SA 2.0, from Wikimedia Commons
More in Xanthium
Sources: classification from World Flora Online Plant List (2026-06, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.