[Wildflowers of the Sunflower Family with Button-like Flower Heads in the Columbia River Gorge of Oregon and Washington]

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

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.

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) - 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)

Common cocklebur as seen on the west bank of the Deschutes River at its mouth..........October 7, 2006.

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)

Common cocklebur as seen along the edges of a small pond at the east side of the Sandy River Delta, Troutdale, Oregon..........September 8, 2012.

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)

Common cocklebur as seen along the Columbia River shoreline along the Washougal Dike, Columbia River Gorge...........August 31, 2015.

Paul Slichter