Cynoglossum officinale

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Cynoglossum officinale L.

Boraginaceae

Life form: annual or biennial
Usage: ornamental plant

Exposure: sun - Exposure: half shade   6

Moisture: moderately moist

Soil: gritty loam

Arrangement: alternate
Leaves: decidious

Shape: oblanceolate

Division: simple

Shape: salverform
Fruit: schizocarp

59C / 7b1535 

Inflorescence: cincinnus

Petals: fully double
Habit: not specified

Growth form: clump-forming

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Lamiidae
Superordo:
Solananae
Ordo:
Boraginales

Cynoglossum officinale, commonly known as Common Hound's Tongue, belongs to the group of annual and biennial plants.

Naming

Cynoglossum officinale was described by Carl Linnaeus in 1753. The name is considered as validly published.

Taxonomy

Cynoglossum officinale is the type species of the genus Cynoglossum which contains approximately 91 to 147 species and belongs to the family of the Boraginaceae (Borage Family).

Characteristics

Growth

The plants reach heights of 15 to 120 centimetres.

Leaves

Cynoglossum officinale is deciduous. The glaucous, simple leaves are alternate. They are oblanceolate, entire and sessile.

Flowers and Fruits

From May to June Cynoglossum officinale produces cincinni of double, dark-purple salverform flowers.

The plants produce schizocarps.

Root System

Distribution

Cynoglossum officinale is native to the whole of Europe, the Caucasus, Turkey, West-Siberia, East Siberia and Central Asia.

Cultivation

The plants prefer a sunny to half-shady situation on moderately moist soil. The substrate should be gritty loam with a pH between 8 and 10. They tolerate temperatures down to -23°C (USDA zone 6).

Classification after Prof. Dr. Sieber

  • open areas

Uses

The recommended planting distance is 40 centimetres, the plants are best planted in groups of 3 to 10. Suited as bee pasture.

Maintenance and Propagation

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

  • Some seedheads should remain on the plant for species preservation.
  • Cut back in autumn.


Cultivars

Poisonousness

Cynoglossum officinale is toxic.

Aeskulap  Please read the health issues note

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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