Ranunculus crenatus

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Ranunculus crenatus Waldst. & Kit.

Ranunculaceae

Life form: perennial
Usage: ornamental plant

Exposure: sun   5

Moisture: moderately moist bis Moisture: moist

Soil: gritty loam

Arrangement: basal
Leaves: semi-evergreen

Shape: orbicular

Division: simple

Shape: cup-shaped
Fruit: nutlet

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Inflorescence: solitary

Petals: not specified
Habit: not specified

Growth form: not specified

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Ranunculopsida
Subclassis:
Ranunculidae
Superordo:
Ranunculanae
Ordo:
Ranunculales

Ranunculus crenatus is a perennial with pure white flowers.

Naming

Ranunculus crenatus was described by Franz de Paula Adam von Waldstein and Pál Kitaibel. The name is considered as validly published.

Taxonomy

Ranunculus crenatus is a species in the genus Ranunculus which contains approximately 432 to 2271 species and belongs to the family of the Ranunculaceae (Buttercup Family). The type species of the genus is Ranunculus auricomus.

Characteristics

Growth

The perennials reach heights of 5 to 8 centimetres.

Leaves

Ranunculus crenatus is semi-deciduous. The dark-green, simple leaves are basal. They are orbicular, crenate and petiolate.

Flowers and Fruits

Ranunculus crenatus produces solitary white cup-shaped flowers from June to July.

The perennials produce nutlets.

Root System

Distribution

Ranunculus crenatus is native to Italy, the Balkan Peninsula, Romania, western European Russia, the eastern Alps, the Apennine Mountains, the Carpathian Mountains and the Balkan Mountains.

Cultivation

The perennials prefer a sunny situation on fresh to moist soil. The substrate should be gritty loam. They tolerate temperatures down to -29°C (USDA zone 5). Under glass use loamy potting compost with added gravel.

Classification after Prof. Dr. Sieber

  • alpine garden (especially for plants that are not very competitive)

Uses

Suited for rockeries.

Maintenance and Propagation

Propagate by sowing just before seeds ripen. Germination may take some time.

Cultivars

Poisonousness

The sap may irritate the skin

Aeskulap  Please read the health issues note

Pests and Diseases

Honeydew, galls and distorted leaves are a sign for an infestation with aphids. Use an insecticide or control biologically , e.g. with parasitic wasps or predators such as Aphidoletes aphidimyza.

A powdery white coat on the plants indicates an infection with powdery mildew. Remove affected plants and apply a fungicide. To prevent infection improve ventilation, keep the roots moist and do not water the plants from above.

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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