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
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
Silybum marianum
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Silybum marianum is a species of thistle. It has various common names including milk thistle, blessed milkthistle, Marian thistle, Mary thistle, Saint Mary's thistle, Mediterranean milk thistle, varie
Thistle
…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…
Illustration
Silybum marianum at Briones Regional Park
Growing in a field