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Cirsium silvaticum Tausch Cirsium vulgare , the spear thistle , bull thistle , or common thistle , is a species of the Asteraceae genus Cirsium , native throughout most of Europe (north to 66°N, locally 68°N), Western Asia (east to the Yenisei Valley), and northwestern Africa ( Atlas Mountains ).
For example, Cirsium heterophyllum has very soft spines while Cirsium spinosissimum is the opposite. [2] Typically, species adapted to dry environments are more spiny. The term thistle is sometimes taken to mean precisely those plants in the tribe Cardueae (synonym: Cynareae), [3] especially the genera Carduus, Cirsium, and Onopordum. [4]
The following species in the flowering plant genus Cirsium, the plume thistles, are accepted by Plants of the World Online. [1] A 2022 molecular study reassigned many species to other genera, but Cirsium remains a speciose genus. [ 2 ]
Cirsium vulgare, for instance, ranked in the top 10 for nectar production in a UK plants survey conducted by the AgriLand project which is supported by the UK Insect Pollinators Initiative. Cirsium vulgare was also a top producer of nectar sugar in another study in Britain, ranked third with a production per floral unit of (2323 ± 418μg). [7]
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Cirsium arvense is a perennial species of flowering plant in the family Asteraceae, ... for example Australia, Brazil, Canada, Ireland, New Zealand, ...
Cirsium horridulum is a biennial herb up to 250 centimetres (100 in) tall, with a large taproot and fleshy side roots that sometimes sprout new shoots. Leaves are up to 40 centimetres (16 in) long with thick, sharp spines along the edges.
Cirsium lanceolatum may refer to: Cirsium lanceolatum (L.) Scop. , a synonym of Cirsium vulgare subsp. vulgare , also known as spear thistle or common thistle Cirsium lanceolatum Hill , a synonym of Cirsium dissectum (L.) Hill , also known as meadow thistle