Cirsium
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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 ot
Cirsium heterophyllum 5 RF
A European goldfinch eating seeds on a Cirsium vulgare (spear thistle) seedhead
Cirsium arizonicum (Arizona thistle)
Cirsium canum (Queen Anne's thistle)
Thistle
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Thistle is the popular name of a group of flowering plants characterised by leaves with sharp spikes on the margins, mostly in the family Asteraceae. Prickles can also occur all over the plant – on th
Cirsium
…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 (Carduus, Silybum and Onopordum) in having a seed with a pappus…
Musk thistle, C. nutans in the Carpathian Mountains
Milk thistle flowerhead
Cirsium arizonicum, showing arachnoid cobwebbiness on stems and leaves, with ants attending aphids that might be taking advantage of the shelter.
Spear Thistle Cirsium vulgare in Scotland, 2007