Centaurea cyanus

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Centaurea cyanus L.

Asteraceae

Life form: annual or biennial
Usage: ornamental plant

Exposure: sun   2

Moisture: moderately moist bis Moisture: moist

Soil: sandy loam - Soil: gritty loam - Soil: sandy clay

Arrangement: not specified
Leaves: decidious

Shape: lanceolate

Division: simple

Shape: many-stellate
Fruit: achene

105C / 00399c 

Inflorescence: solitary

Petals: not specified
Habit: not specified

Growth form: not specified

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Asteridae
Superordo:
Asteranae
Ordo:
Asterales
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Centaurea cyanus belongs to the group of annual and biennial plants.

Contents

Naming

Centaurea cyanus was described by Carl Linnaeus in 1753. The name is considered as validly published.

Taxonomy

Centaurea cyanus is a species in the genus Centaurea which contains approximately 864 to 1486 species and belongs to the family of the Asteraceae (Aster Family). The type species of the genus is Centaurea paniculata.

Characteristics

Centaurea cyanus - flowers

Growth

The plants reach heights of 20 to 80 centimetres.

Leaves

Centaurea cyanus is deciduous. The leaves are simple and green. They are lanceolate with entire margins.

Flowers and Fruits

Centaurea cyanus produces solitary blue many-stellate flowers from May to July.

The plants produce achenes.

Root System

Distribution

Centaurea cyanus is native to Sicily and Malta and the Balkan Peninsula and is naturalized in the whole of Europe, the Caucasus, West-Siberia, East Siberia, Northwest Africa and North America.

Cultivation

The plants prefer a sunny situation on fresh to moist soil. The substrate should be sandy-loamy, gritty-loamy or sandy clay soil. They tolerate temperatures down to -45°C (USDA zone 2).

Classification after Prof. Dr. Sieber

  • woodland borders (soil usually rich in humus)

Tolerance of special soil conditions

  • none: drought

Uses

The recommended planting distance is 25 centimetres. Suited as cut flowers and as bee pasture.

Maintenance and Propagation

The plants usually need very little maintenance.

Propagation

  • Sowing
  • Cuttings
  • Division


Cultivars

Pests and Diseases

Literature

  • Walter Erhardt, Erich Götz, Nils Bödeker, Siegmund Seybold: Der große Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
  • Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.

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