Beach-bur, Cutleaf Beach Bur, Cutleaf Beach Bur, Silver Beachweed, Silver Bur Ragweed
Ambrosia chamissonis var. bipinnatisecta
Synonyms: Franseria chamissonis ssp. bipinnatisecta, Franseria chamissonis var. bipinnatisecta
Cutleaf beach bur as seen on the cobbles of the upper beach at Oceanside, OR........June 19, 2010.
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Additional close-up views of cutleaf beach bur as seen on the cobbles of the upper beach at Oceanside, OR.........June 19, 2010.
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What is probably the former Ambrosia chamissonis var. chamissonis on the beach at Oceanside, Oregon...........August 25, 2012. Note the silvery white leaves which are incised to deeply lobed. Ambrosia chamissonis var. bipinnatisecta was observed blooming next to this plant several feet away.
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Close-ups of cutleaf beach bur, the former Ambrosia chamissonis var. bipinnatisecta on the cobble upper beach at Oceanside, Oregon...........August 25, 2012. This plant is only a few feet away from that of Ambrosia chamissonis var. chamissonis pictured directly above. Note the greenish-blue, bipinnatifid to tripinnatifid leaves.
Beach bur as seen at the end of Jetty Road SW at the Bandon Jetty South Park, Bandon, Oregon..........April 18, 2016.
Paul Slichter