Centaurea cyanus
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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
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Species details: Click on each item to see an explanation of that item (Note: opens a new window)
| Synonyms: | |
| Common names: | Bachelor's button (English) Cornflower (English) |
| Frequency: | |
| Status: | Introduced and very rarely naturalised |
| Description: |
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. |
| Type location: |
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| Notes: | |
| Derivation of specific name: | cyanus: blue, referring to the flowers |
| Habitat: | In crack in concrete road. |
| Altitude range: (metres) | |
| Flowering time: | |
| Worldwide distribution: | Native to Europe and the Middle East; cultivated and escaping in other countries. |
| FZ divisions: | E |
| Growth form(s): | |
| Endemic status: | |
| Red data list status: | |
| Insects associated with this species: | |
| Spot characters: | Display spot characters for this species |
| Literature: |
Clapham, A.R., Tutin, T.G. & Moore, D.M. (1989). Flora of the British Isles. 3rd edition. Cambridge University Press, Cambridge Page 487. |
Other sources of information about Centaurea cyanus:
External websites:
African Plants: A Photo Guide (Senckenberg): Centaurea cyanusAfrican Plant Database: Centaurea cyanus
BHL (Biodiversity Heritage Library): Centaurea cyanus
EOL (Encyclopedia of Life): Centaurea cyanus
GBIF (Global Biodiversity Information Facility): Centaurea cyanus
Google: Web - Images - Scholar
iNaturalist: Centaurea cyanus
IPNI (International Plant Names Index): Centaurea cyanus
JSTOR Plant Science: Centaurea cyanus
Mansfeld World Database of Agricultural and Horticultural Crops: Centaurea cyanus
Plants of the World Online: Centaurea cyanus
Tropicos: Centaurea cyanus
Wikipedia: Centaurea cyanus