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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).
Cirsium vulgare was ranked in the top ten for nectar production in a UK plants survey conducted by the AgriLand project supported by the UK Insect Pollinators Initiative. [7] Bull thistle was a top producer of nectar sugar in another study in Britain, ranked third with a production per floral unit of (2323 ± 418μg). [5]
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]
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 arvense is a perennial species of flowering plant in the family Asteraceae, native throughout Europe and western Asia, northern Africa and widely introduced ...
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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 rivulare is a species of flowering plant in the family Asteraceae, native to eastern and western Europe, adventive in Britain, and naturalised in Sweden and Belgium. [ 1 ] Growing to 1.5 m (4.9 ft) tall, this erect herbaceous perennial is a clump-forming thistle, with narrow grey-green prickly leaves and small purple globular ...