Tetradymia axillaris
Encyclopedia
Tetradymia axillaris is a flowering plant in the daisy family
Asteraceae
The Asteraceae or Compositae , is an exceedingly large and widespread family of vascular plants. The group has more than 22,750 currently accepted species, spread across 1620 genera and 12 subfamilies...

 known by the common names longspine horsebrush and cottonthorn. This is a plant of the sagebrush
Artemisia (plant)
Artemisia is a large, diverse genus of plants with between 200 to 400 species belonging to the daisy family Asteraceae. It comprises hardy herbs and shrubs known for their volatile oils. They grow in temperate climates of the Northern Hemisphere and Southern Hemisphere, usually in dry or semi-dry...

 and desert plant communities of the southwestern United States.

The plant forms a sprawling thicket and is very spiny. The green leaves dry and their tissues fall away, leaving the veins as hard, sharp spines. When in foliage the bush has green, hairy stems and bears yellow daisylike flowerheads in the axils, or angles, of the newest branches. The fruits are released in masses of cottony seed.

The sharp spines were used as tattooing needles by the Kawaiisu
Kawaiisu
thumb|Kawaiisu FamilyThe Kawaiisu are a Native American group who lived in the southern California Tehachapi Valley and across the Tehachapi Pass in the southern Sierra Nevada Mountains to the north, toward Lake Isabella and Walker Pass...

 Native Americans of California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

.

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