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  2. Cirsium - Wikipedia

    en.wikipedia.org/wiki/Cirsium

    Cirsium is a genus of perennial and biennial flowering plants in the Asteraceae, one of several genera known commonly as thistles. They are more precisely known as plume thistles [ citation needed ] .

  3. Cirsium vulgare - Wikipedia

    en.wikipedia.org/wiki/Cirsium_vulgare

    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).

  4. List of Cirsium species - Wikipedia

    en.wikipedia.org/wiki/List_of_Cirsium_species

    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 ]

  5. Cirsium arvense - Wikipedia

    en.wikipedia.org/wiki/Cirsium_arvense

    Cirsium arvense is a C3 carbon fixation plant. [12] The C3 plants originated during Mesozoic and Paleozoic eras, and tend to thrive in areas where sunlight intensity is moderate, temperatures are moderate, and ground water is plentiful. C 3 plants lose 97% of the water taken up through their roots to transpiration. [13]

  6. Cirsium horridulum - Wikipedia

    en.wikipedia.org/wiki/Cirsium_horridulum

    Thomas Nuttall (1786-1859) described var. megacanthum as "one of the most terribly armed plants in the genus." [8] [9] 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 ...

  7. Cirsium occidentale - Wikipedia

    en.wikipedia.org/wiki/Cirsium_occidentale

    Cirsium occidentale is a biennial plant or perennial plant forming a taproot. It may be short or quite tall, forming low clumps or towering to heights approaching 3 meters (10 feet). The leaves are dull gray-green to bright white due to a coating of hairs, and the most basal ones on large plants may be nearly 0.5 m (1 + 1 ⁄ 2 ft) in length.

  8. Cirsium eriophorum - Wikipedia

    en.wikipedia.org/wiki/Cirsium_eriophorum

    Cirsium eriophorum, the woolly thistle, [2] is a herbaceous biennial species of flowering plant in the genus Cirsium of the family Asteraceae. It is widespread across much of Europe. It is a large biennial plant with sharp spines on the tips of the leaves, and long

  9. Cirsium altissimum - Wikipedia

    en.wikipedia.org/wiki/Cirsium_altissimum

    Cirsium altissimum is, as the name implies, a tall herb, sometimes reaching as much as 400 cm (13 ft) in sunny areas and 150 cm (5 ft) in the shade. It is a biennial or perennial plant, blooming only once before dying. In its first year, the plant appears as a rosette of leaves, slightly hairy, with small spines along the leaf margins. The ...