Cirsium rivulare

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Cirsium rivulare
Cirsium rivulare sl1.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Cirsium
Species:
C. rivulare
Binomial name
Cirsium rivulare

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 flowerheads in early to midsummer. [2]

The Latin specific epithet rivulare means "brook loving". [3] The plant prefers moist conditions but can tolerate some dryness.

The cultivar Cirsium rivulare 'Atropurpureum', with deep crimson flowers, has received the Royal Horticultural Society's Award of Garden Merit. [4] It is very hardy down to at least −20 °C (−4 °F) (RHS rating H7), and thrives in full sun.

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References

  1. "Cirsium rivulare". Germplasm Resources Information Network . Agricultural Research Service, United States Department of Agriculture.
  2. Brickell, Christopher (2008). The Royal Horticultural Society A-Z encyclopedia of garden plants (3rd ed.). United Kingdom: Dorling Kindersley. ISBN   9781405332965.
  3. Harrison, Lorraine (2012). RHS Latin for Gardeners. United Kingdom: Mitchell Beazley. ISBN   184533731X.
  4. "Cirsium rivulare 'Atropurpureum'". RHS. Retrieved 12 April 2020.