Arnica chamissonis Less.
Arnica chamissonis is a perennial.
Arnica chamissonis was described by Christian Friedrich Lessing in 1831. The name is considered as validly published.
Arnica chamissonis is a species in the genus Arnica which contains approximately 37 to 52 species and belongs to the family of the Asteraceae (Aster Family). The type species of the genus is Arnica montana.
The perennials are comparatively short-lived and reach heights of 20 to 80 centimetres.
Arnica chamissonis is deciduous. The green, simple leaves are opposite. They are lanceolate, entire and sessile.
Flowers and Fruits
Arnica chamissonis produces solitary yellow many-stellate flowers from May to July.
The perennials produce brown achenes in summer.
Arnica chamissonis is native to Alaska, British Columbia, the Northwest of the US, California, the Rocky Mountains and the Southwest of the US.
The perennials prefer a sunny situation on fresh to moist soil. They prefer sandy-loamy or gritty-loamy soil with a pH between 6 and 7,2. The plants need a soil depth of at least 20 centimetres for good growth. They tolerate temperatures down to -45Â°C (USDA zone 2).
Classification after Prof. Dr. Sieber
- open areas
- woodland borders (soil usually rich in humus)
Tolerance of special soil conditions
- low: calcareous soil
The recommended planting distance is 40 centimetres, the perennials are best planted in groups of 3 to 10.
Maintenance and Propagation
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.