Psorothamnus spinosus (A. Gray) Barneby
Smoke tree, smokethorn, smokethorn dalea, Corona de Cristo
The smoke tree is native to western North America.
Plants: This is a large shrub or small tree, heavily branched and irregular in shape, spiny, up to 20′ (6.1 m) tall.
Leaves: The tree is nearly leafless, but has small bluish-gray wedge-shaped leaves that are widest near the top, ¼″ (8.5 mm) long.
Flowers: Dark purple to deep blue, pea-shaped, ¼–5/16″ (6.3–8.3 mm) across, in loose clusters.
Fruits: Roughly egg-shaped, ¼″ (8.3 mm) long, one end pointed, with dark red glands.
Habitats: Desert sandy washes.
| Similar species. |
Online References:
2/28/2010 · Anza-Borrego Desert State Park, California 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Rosidae | Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more |
| Order | Fabales | Legumes (pea and bean families) |
| Family | Fabaceae | Legume family (peas and beans) |
| Genus | Psorothamnus | From the Greek psoros, “mangy, scabby,” and thamnos, “bush,” thus “scabshrub” |
| Species | spinosus | From Latin for “thorny” |
Psorothamnus spinosus description by Thomas H. Kent, not updated.
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