Centaurea cyanus L.
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Photo: Mark Hyde
Vumba, c. 2kms SE of Leopard Rock Hotel
Photo: Mark Hyde
Vumba, c. 2kms SE of Leopard Rock Hotel
Photo: Mark Hyde
Vumba, c. 2kms SE of Leopard Rock Hotel
Species details: Click on each item to see an explanation of that item (Note: opens a new window)
Synonyms:
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Common names:
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Bachelor's button (English)
Cornflower (English)
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Frequency:
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Status:
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Introduced and very rarely naturalised |
Description:
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Annual herb with an erect wiry cottony stem to 90 cm tall, with many ascending branches. Lower leaves petiolate, lyrate-pinnatifid; upper leaves smaller, sessile, linear-lanceolate; all leaves greyish with cottony hairs. Heads 1.5-3 cm in diameter, solitary on main stem and branches. Involucre ovoid; phyllaries with appendages which are cut into spreading narrowly triangular teeth; those of the outer bracts silvery-white, those of the middle bracts brown. Marginal flowers large, bright blue; inner red-purple. Achenes silvery-grey, pubescent. |
Notes:
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Derivation of specific name:
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cyanus: blue, referring to the flowers |
Habitat:
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In crack in concrete road. |
Altitude range: (metres) |
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Flowering time: | |
Worldwide distribution:
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Native to Europe and the Middle East; cultivated and escaping in other countries. |
Zimbabwe distribution:
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E |
Growth form(s):
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Endemic status:
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Red data list status:
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Insects associated with this species:
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Spot characters:
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Display spot characters for this species |
Literature:
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Clapham, A.R., Tutin, T.G. & Moore, D.M. (1989). Flora of the British Isles. 3rd edition. Cambridge University Press, Cambridge Page 487.
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Other sources of information about Centaurea cyanus:
External websites:
African Plants: A Photo Guide (Senckenberg):
Centaurea cyanusBHL (Biodiversity Heritage Library):
Centaurea cyanusEOL (Encyclopedia of Life):
Centaurea cyanusePIC (electronic Plant Information Center):
Centaurea cyanusFlora Zambesiaca web site:
Centaurea cyanusGBIF (Global Biodiversity Information Facility):
Centaurea cyanusGoogle:
Web -
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ScholarGRIN (Germplasm Resources Information Network):
Centaurea cyanusiNaturalist:
Centaurea cyanusIPNI (International Plant Names Index):
Centaurea cyanusJSTOR Plant Science:
Centaurea cyanusKew Herbarium catalogue:
Centaurea cyanusMansfeld World Database of Agricultural and Horticultural Crops:
Centaurea cyanusPlants of the World Online:
Centaurea cyanusTropicos:
Centaurea cyanusWikipedia:
Centaurea cyanus
Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-22
Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M.
(2022).
Flora of Zimbabwe: Species information: Centaurea cyanus. https://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=228910, retrieved 27 May 2022
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