Called “thistles” in GBIF
Cirsium is a genus of perennial and biennial flowering plants in the Asteraceae, one of several genera known commonly as thistles. They are more precisely known as plume thistles. These differ from other thistle genera in having a seed with a pappus of feathered hairs on their achenes. The other genera have a pappus of simple unbranched hairs.
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Cirsium vulgare
2 articles
Cirsium horridulum
1 article
Cirsium nuttallii
1 article
Cirsium pitcheri
1 articleIf you've ever donated to or volunteered with a native plant restoration, this study is proof tha...
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That spiky purple-flowered weed pushing through sidewalk cracks near you might be Bull Thistle, a...
Nuttall's Thistle attracts native bees, butterflies, and goldfinches to Florida yards and roadsid...
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Every article on Plant News that mentions a member of this genus, newest first.
A 30-year experiment reintroducing an endangered Great Lakes thistle shows that carefully planted seeds can rebuild wild populations, but the new colonies still need more genetic diversity added over time to stay healthy long-term.
If you're weeding a garden or hiking trail near the Olympic Peninsula, this is the same aggressive, spiny thistle that...
That spiky purple-flowered weed pushing through sidewalk cracks near you might be Bull Thistle, a European import that...
Nuttall's Thistle attracts native bees, butterflies, and goldfinches to Florida yards and roadsides — spotting it confirmed in...
Bristle thistle is a native wildflower that supports specialist bees, goldfinches, and monarch butterflies — so knowing where...