https://gardenology.mywikis.net/w/index.php?action=history&feed=atom&title=Cirsium_arvense 2026-04-12T19:18:26Z Revision history for this page on the wiki MediaWiki 1.35.3 https://gardenology.mywikis.net/w/index.php?title=Cirsium_arvense&diff=3393&oldid=prev 2007-05-03T04:12:26Z

<p></p> <p><b>New page</b></p><div>{{Taxobox<br /> | color = lightgreen<br /> | name = ''Cirsium arvense''<br /> | image = Thistle with cuckoo spit.jpeg<br /> | image_width = 240px<br /> | regnum = [[Plant]]ae<br /> | divisio = [[Magnoliophyta]]<br /> | classis = [[Magnoliopsida]]<br /> | ordo = [[Asterales]]<br /> | familia = [[Asteraceae]]<br /> | genus = ''[[Cirsium]]''<br /> | species = '''''C. arvense'''''<br /> | binomial = ''Cirsium arvense''<br /> | binomial_authority = ([[Carolus Linnaeus|L.]]) [[Giovanni Antonio Scopoli|Scop.]]<br /> }}<br /> <br /> '''''Cirsium arvense''''', also known as the '''California Thistle''', '''Canada Thistle''', '''Corn Thistle''', '''Creeping Thistle''', '''Cursed Thistle''', '''Green Thistle''', '''Hard Thistle''', '''Perennial Thistle''', '''Prickly Thistle''', '''Small-flowered Thistle''', and '''Way Thistle''', is a very serious [[invasive species]] of the genus ''[[Cirsium]]'', native throughout [[Europe]], [[Asia]] and northern [[Africa]]. This plant is cited as a noxious [[weed]] in several countries; for example [[Brazil]] and the [[United States]]. It is designated an &quot;injurious weed&quot; under the UK Weeds Act 1959[http://www.defra.gov.uk/farm/wildlife/weeds/index.htm].<br /> <br /> It is a tall [[herbaceous]] [[perennial plant]], forming an extensive underground [[root]] system that sends up numerous erect stems each spring, reaching 1-2 m tall; the stems often lie partly flat by summer but can stay erect if supported by other vegetation. The [[leaf|leaves]] are very spiny, lobed, up to 15-20 cm long and 2-3 cm broad (smaller on the upper part of the flower stem). The [[inflorescence]] is 1-2 cm diameter, pink-purple, with all the florets of similar form (no division into disc and ray florets). The [[seed]]s are 4-5 mm long, with a downy pappus which assists in wind dispersal.<br /> <br /> Creeping Thistle is used as a food plant by the [[Engrailed]], a species of [[moth]]. <br /> <br /> Several other names have been applied to the species, including Field Thistle, and the very confusing &quot;Canada Thistle&quot; (it is not a native of [[Canada]], being an introduction there).<br /> <br /> ==Edibility==<br /> ''Cirsium'' species, are, for the most part, edible; however, the [[leaf|leaves]] are considered bitter and therefore rendered inedible; the [[taproot]] is considered the most nutritious. In [[Scotland]] (especially [[Fife]]) they are considered a delicacy, albeit a somewhat unusual one.<br /> <br /> ==External links==<br /> *[http://plants.usda.gov/java/profile?symbol=CIAR4 USDA Plants Profile: ''Cirsium arvense'']<br /> <br /> {{Wmog|Cirsium arvense}}<br /> <br /> [[Category:Asteraceae]]<br /> [[Category:Flora of Europe]]<br /> [[Category:Flora of Estonia]]<br /> [[Category:Flora of the United Kingdom]]<br /> [[Category:Invasive species]]</div>

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