Psorothamnus
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Psorothamnus is a genus of plants in the legume family. These are shrubs and small trees. Many are known by the general common name indigo bush. Some are referred to as daleas, as this genus was once included in genus Dalea. These are generally thorny, thickly branched, strongly-scented bushes. Most species bear lupinlike raceme inflorescences of bright purple legume flowers and gland-rich pods. Psorothamnus species are native to the southwestern United States and northern Mexico.
Species:
- Psorothamnus arborescens - Mojave indigo bush
- Psorothamnus emoryi - dyebush, Emory's indigo bush
- Psorothamnus fremontii - Fremont's indigo bush
- Psorothamnus kingii - King's dalea
- Psorothamnus polydenius - Nevada dalea
- Psorothamnus schottii - Schott's dalea
- Psorothamnus scoparius - broom dalea
- Psorothamnus spinosus - smoketree, smokethorn
- Psorothamnus thompsoniae - Thompson's dalea
