Asarum caudatum

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Asarum caudatum Lindl.

Aristolochiaceae

Life form: perennial

Exposure: half shade - Exposure: shade   7

Moisture: moist

Arrangement: basal
Leaves: evergreen

Shape: cordate

Division: simple

Shape: six-stellate
Fruit: not specified

VII

165B / 92481f 

Inflorescence: solitary

Petals: not specified
Habit: not specified

Growth form: prostrate

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Piperopsida
Subclassis:
Piperidae
Superordo:
Lactoridanae
Ordo:
Aristochiales

Asarum caudatum is a perennial.

Naming

Asarum caudatum was described by John Lindley in 1831. The name is considered as validly published.

Taxonomy

Asarum caudatum is a species in the genus Asarum which contains approximately 130 to 142 species and belongs to the family of the Aristolochiaceae (Birthwort Family). The type species of the genus is Asarum europaeum.

Characteristics

Asarum caudatum - flowers

Growth

The comparatively slow-growing perennials have a prostrate growth and reach heights of 5 to 8 centimetres. The plants reach a width of 10 to 30 centimetres.

Leaves

Asarum caudatum is evergreen. The dark-green, simple leaves are basal. They are cordate and petiolate with entire margins and palmate venation. The surface of the leaves is glabrous.

Flowers and Fruits

Asarum caudatum produces solitary brown six-stellate flowers in July. The plants are hermaphroditic.

The perennials produce brown fruits in summer.

Root System

The plants form tap roots.

Distribution

Asarum caudatum is native to western Canada, the Northwest of the US, the Rocky Mountains and California.

Cultivation

The perennials prefer a half-shady to shady situation on moist soil. The substrate should have a pH between 4 and 6. They tolerate temperatures down to -18°C (USDA zone 7).

Classification after Prof. Dr. Sieber

  • woodland borders (soil usually rich in humus)
  • woods (soil usually rich in organic material)

Uses

The ornamental value of Asarum caudatum lies especially in its fragrance. The recommended planting distance is 25 centimetres, the perennials are best planted in groups of 5 to 15. Suited for rockeries and for beds and borders, as well as suited as groundcover.

Maintenance and Propagation

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

Propagate by division.

Cultivars

Poisonousness

Asarum caudatum is moderately toxic.

Aeskulap  Please read the health issues note

Pests and Diseases

Irregular swelling, so-called 'galls', may be caused by insects, mites, fungi or bacteria. Destroy affected parts. To prevent infection avoid injuring the plants and improve drainage.

Brown, orange or yellowish pustules on shoots and on the leaves lower surfaces are very likely caused by a fungal infestation (rust). Remove affected parts and apply fungicide. Also improve ventilation and reduce humidity.

Gnaw marks and slime trails indicate a problem with slugs. Prevent infestation by improving hygiene and by regularly working the soil. In case of an infestation use slug pellets or nematodes to control pest. Handpicking the slug also helps, do this preferably in the evening hours.

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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