Allium caeruleum

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Allium caeruleum Pall.

Alliaceae

Life form: bulb or tuber

Exposure: sun   7

Moisture: dry bis Moisture: moderately moist

Soil: sandy loam - Soil: gritty loam - Soil: sandy clay - Soil: loamy clay - Soil: peat

Arrangement: basal
Leaves: decidious

Shape: linear

Division: simple

Shape: six-stellate
Fruit: loculicidal capsule

112A / 9ab5dd 

Inflorescence: umbel

Petals: not specified
Habit: not specified

Growth form: not specified

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Liliopsida
Subclassis:
Liliidae
Superordo:
Lilianae
Ordo:
Amaryllidales

Allium caeruleum, commonly known as blue allium, belongs to the group of bulbous and tuberous plants.

Naming

Allium caeruleum was described by Peter Simon von Pallas in 1773. The name is considered as validly published.

Taxonomy

Allium caeruleum is a species in the genus Allium which contains approximately 943 to 1011 species and belongs to the family of the Alliaceae (Garlic Family). The type species of the genus is Allium sativum.

Characteristics

Allium caeruleum - flowers

Growth

The plants reach heights of 50 to 60 centimetres.

Leaves

Allium caeruleum is deciduous. The dark-green, simple leaves are basal. They are linear with entire margins and parallel venation.

Flowers and Fruits

Allium caeruleum produces umbels of light-blue six-stellate flowers from June to July.

The plants carry ornamental loculicidal capsules.

Root System

Distribution

Allium caeruleum is native to eastern European Russia, West-Siberia, Central Asia and China.

Cultivation

The plants prefer a sunny situation on dry to moderately moist soil. The substrate should be sandy-loamy, gritty-loamy, sandy clay, loamy clay or peaty soil with a pH between 8 and 10. They tolerate temperatures down to -18°C (USDA zone 7).

Classification after Prof. Dr. Sieber

  • flower beds (rich soil)
  • open areas

Uses

The recommended planting distance is 20 centimetres, the plants are best planted in groups of 5 to 10. Suited as cut flowers and as bee pasture.

Maintenance and Propagation

The plants need little to no maintenance if grown under suitable conditions.

Propagate by sowing or by bulblets.

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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