Purshia tridentata (Pursh) DC.
Purshia tridentata, commonly known as bitterbrush, antelope bush, is a shrub.
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.
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
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.
Purshia tridentata is native to Oregon, the Rocky Mountains, California and the Southwest of the US.
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 -18Â°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
The recommended planting distance is 1,2 to 1,8 metres.
Maintenance and Propagation
Propagate by sowing. The seeds require vernalization.
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.