Family = Asteraceae, Genus = Ambrosia, Species = chamissonis, including synonyms,
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|Ambrosia chamissonis (silver bur ragweed, cutleaf beach bur)
(= Ambrosia chamissonis vars. bipinnatisecta, chamissonis in Flora of the Pacific Northwest)
Monoecious, succulent perennial 2-10 dm. tall, forming large, lax clumps, the stems much branched below the surface, the herbage silvery with appressed hairs.
Distribution: Maritime shoreline from British Columbia to california
Habitat: Common on sandy beaches above high tide level
WA Native Plant Society