Cynoglossum officinale L.
Cynoglossum officinale, commonly known as Common Hound's Tongue, belongs to the group of annual and biennial plants.
Cynoglossum officinale was described by Carl Linnaeus in 1753. The name is considered as validly published.
The plants reach heights of 15 to 120 centimetres.
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.
Cynoglossum officinale is native to the whole of Europe, the Caucasus, Turkey, West-Siberia, East Siberia and Central Asia.
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 -23Â°C (USDA zone 6).
Classification after Prof. Dr. Sieber
- open areas
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.
Cynoglossum officinale is toxic.
Please read the health issues note!
Pests and Diseases
- Walter Erhardt, Erich GÃ¶tz, Nils BÃ¶deker, Siegmund Seybold: Der groÃe 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.