Purshia tridentata

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Purshia tridentata (Pursh) DC.

Rosaceae

Life form: shrub

Exposure: half shade   7

Moisture: dry

Arrangement: alternate
Leaves: decidious

Shape: not specified

Division: simple

Shape: five-stellate
Fruit: nutlet

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3D / efe981 

Inflorescence: solitary

Petals: not specified
Habit: not specified

Growth form: not specified

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Rosidae
Superordo:
Rosanae
Ordo:
Rosales

Purshia tridentata, commonly known as bitterbrush, antelope bush, is a shrub.

Naming

Purshia tridentata was already described and the name validly published by Frederick Traugott Pursh. It was Augustin Pyramus de Candolle, however, who reclassified it into todays valid botanical systematics in 1818.

Taxonomy

Purshia tridentata is a species in the genus Purshia which contains approximately 6 to 10 species and belongs to the family of the Rosaceae (Rose Family).

Characteristics

Growth

The comparatively long-lived shrubs reach heights of 1,8 metres, they have a erect habit and produce multiple stems. The main growing season is in spring and summer. The plants reach a width of 2 to 3 metres.

Wood and Bark

Leaves

Purshia tridentata is deciduous. The simple leaves are alternate.

Flowers and Fruits

Purshia tridentata produces solitary ligth-yellow five-stellate flowers in May.

The shrubs produce ornamental brown nutlets from spring to summer.

Root System

Distribution

Purshia tridentata is native to Oregon, the Rocky Mountains, California and the Southwest of the US.

Cultivation

The shrubs prefer a half-shady situation on dry soil. They prefer soil with a pH between 5,6 and 8,4 and need a soil depth of at least 51 centimetres for good growth. They tolerate temperatures down to -18°C (USDA zone 7) and need a frost-free period of at least 14 weeks.

Tolerance of special soil conditions

  • none: soil salinity
  • low: anaerobic soil
  • high: drought, calcareous soil

Uses

The recommended planting distance is 1,2 to 1,8 metres.

Maintenance and Propagation

Propagate by sowing. The seeds require vernalization.

Cultivars

Pests and Diseases

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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