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iNaturalist | all galleries >> Plants >> Exotic Plants of the Bay Area >> Weeds of the Grasslands > Italian Thistle, Carduus pycnocephalus
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11-MAY-2008

Italian Thistle, Carduus pycnocephalus

Carduus pycnocephalus. (Carduus = Latin for thistle; pycno+cephalus = dense-headed)

This thistle is common in Pulgas Ridge County Park where it lines many miles of trails.


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