Orostachys spinosa

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Orostachys spinosa (L.) Sweet

Crassulaceae

Life form: annual or biennial

Exposure: sun   10

Moisture: moderately moist bis Moisture: moist

Soil: gritty loam

Arrangement: rosette
Leaves: decidious

Shape: oblanceolate

Division: simple

Shape: five-stellate
Fruit: follicle

150B / c3d238 

Inflorescence: raceme

Petals: not specified
Habit: not specified

Growth form: not specified

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Rosidae
Superordo:
Saxifraganae
Ordo:
Saxifragales

Orostachys spinosa is a succulent and belongs to the group of annual and biennial plants.

Naming

Orostachys spinosa was already described and the name validly published by Carl Linnaeus. It was Robert Sweet, however, who reclassified it into todays valid botanical systematics in 1830.

Taxonomy

Orostachys spinosa is a species in the genus Orostachys which contains approximately 12 to 27 species and belongs to the family of the Crassulaceae (Stonecrop Family).

Characteristics

Growth

The plants reach heights of 10 to 30 centimetres.

Leaves

Orostachys spinosa is deciduous. The glaucous, simple leaves are in rosettes. They are oblanceolate, entire and sessile.

Flowers and Fruits

Orostachys spinosa produces racemes of light-green five-stellate flowers from June to July.

The plants produce follicles.

Root System

Distribution

Orostachys spinosa is native to the European Russia (Belarus, the Ukraine, Moldova, Crimea), West-Siberia, East Siberia, Xin-Jiang, Central Asia, Mongolia and Tibet.

Cultivation

The plants prefer a sunny situation on fresh to moist soil. The substrate should be gritty-loamy and comparatively poor. They tolerate temperatures only above at least 1°C (USDA zone 10). Under glass use cactus compost.

Classification after Prof. Dr. Sieber

  • rockeries

Uses

Suited for rockeries.

Maintenance and Propagation

  • Winter protection from late frost.
  • For healthy growth apply a compound fertilizer at 50% concentration every 2 months during growth.
  • Water freely in summer, give little water in winter.

Propagate by sowing or by division.

Cultivars

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.

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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