tall thistle

== English == === Noun === tall thistle (countable and uncountable, plural tall thistles) Cirsium altissimum ==== Synonyms ==== (Cirsium altissimum): roadside thistle, wood-thistle ==== Translations ==== === Further reading === Cirsium on Wikipedia.Wikipedia Cirsium altissimum on Wikispecies.Wikispecies Category:Cirsium altissimum on Wikimedia Commons.Wikimedia Commons tall thistle at USDA Plants database