Psorothamnus spinosus
| Psorothamnus spinosus | |
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| Species: | P. spinosus
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| Psorothamnus spinosus | |
The Smokethorn (Psorothamnus spinosus) is a perennial legume tree common to the desert washes of the southern part of California, Arizona, and most of Baja California. The Smokethorn is also common to Joshua Tree National Park where it is called the Smoketree.
The twigs of the Smokethorn are slender and densely covered with fine whitish hairs. The flowers are lateral clusters of purple in June, with small seeded pea pods as its fruit.
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