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Cirsium vulgare
Spotted this thistle when I was hiking in Sibley Volcanic Regional Preserve, Oakland, CA.
Sibley Volcanic Regional Preserve, Oakland, CA.
Purple flowers of all of thistles make a nice anti-inflammatory salve: http://www.ehow.com/how_5626334_make-sal...
Spotted on Sep 16, 2011
Submitted on Oct 2, 2011
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