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Separate cypselae. Onopordum acanthium (cotton thistle, Scotch (or Scottish) thistle) is a flowering plant in the family Asteraceae.It is native to Europe and Western Asia from the Iberian Peninsula east to Kazakhstan, and north to central Scandinavia, and widely naturalised elsewhere, [1] [2] [3] with especially large populations present in the United States and Australia.
Cotton thistle (Onopordum acanthium) from Thomé Flora von Deutschland, Österreich und der Schweiz 1885. Onopordum, or cottonthistle, [3] is a genus of plants in the tribe Cardueae within the family Asteraceae. [4] They are native to southern Europe, northern Africa, the Canary Islands, the Caucasus, and southwest and central Asia. They grow ...
Silybum marianum is a species of thistle.It has various common names including milk thistle, [1] blessed milkthistle, [2] Marian thistle, Mary thistle, Saint Mary's thistle, Mediterranean milk thistle, variegated thistle and Scotch thistle (not to be confused with Onopordum acanthium or Cirsium vulgare).
Milk thistle flowerhead Cirsium arizonicum, showing arachnoid cobwebbiness on stems and leaves, with ants attending aphids that might be taking advantage of the shelter. Thistle is the common name of a group of flowering plants characterized by leaves with sharp spikes on the margins, mostly in the family Asteraceae. Prickles can also occur all ...
The Cardueae are a tribe of flowering plants in the daisy family and the subfamily Carduoideae. [5] Most of them are commonly known as thistles; [6] four of the best known genera are Carduus, [7] Cynara (containing the widely eaten artichoke), Cirsium, [7] and Onopordum.
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Milk thistle flowerhead. Each of the United Kingdom's four constituent countries has one or more national flower: England – Tudor rose [66] Wales – daffodil, [67] leek [66] Northern Ireland – flax flower, [68] clover leaf; Scotland – thistle, [66] Scots pine [69]
Cirsium vulgare (spear thistle) is listed in the United States (where as a non-native invasive species it has been renamed "bull thistle") as a noxious weed in nine states. [6] Some species in particular are cultivated in gardens and wildflower plantings for their aesthetic value and/or to support pollinators such as bees and butterflies.