Canada Cocklebur, Common Cocklebur
, Rough Cocklebur
Xanthium strumarium
Synonyms: Xanthium strumarium var. canadense, Xanthium strumarium var. glabratum, Xanthium strumarium var. oviforme, Xanthium strumarium var. pensylvanicum, Xanthium strumarium var. wootonii
The photo above shows common cocklebur on the beach at Dalton Point in the western Columbia River Gorge........September 1, 2007.
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Common cocklebur as seen on the west bank of the Deschutes River at its mouth..........October 7, 2006.
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Common cocklebur as seen at left along the edges of a small pond at the east side of the Sandy River Delta, Troutdale, Oregon..........September 8, 2012.
Common cocklebur as seen at right along the Columbia River shoreline along the Washougal Dike, Columbia River Gorge...........August 31, 2015.
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Common cockleburs observed on Pierce Island, Columbia River.......October 7, 2021.
Paul Slichter