<b><i><a href="//commons.wikimedia.org/wiki/Category:Cirsium_hydrophilum" title="Category:Cirsium hydrophilum">Cirsium hydrophilum</a></i> var. <i>hydrophilum</i></b> — Critically Endangerd species of thistle.
<ul><li>Endemic to California, in the San Francisco Bay Area and the Sacramento-San Joaquin River Delta.</li></ul>
USFWS photo, no copyright
Valary Bloom
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<a rel="nofollow" class="external free" href="https://ecos.fws.gov/docs/five_year_review/doc2400.pdf">http://ecos.fws.gov/docs/five_year_review/doc2400.pdf</a>