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Longspine horsebrush

Tetradymia axillaris

Also called Long Spine Horsebrush

Longspine horsebrush
Photo: Stan Shebs, CC BY-SA 3.0

Longspine horsebrush is a spiny, sprawling desert shrub in the daisy family, native to the southwestern United States, where it grows in sagebrush and desert communities. It is a wild plant rarely grown in gardens, and it needs full sun, very good drainage and minimal water.

Family
Asteraceae (Daisy family)
Grows as
Shrub
Light
Full sun
Water
Water sparingly once established; let the soil dry out fully between waterings.
Soil
Sandy or gravelly, very well-drained soil.
Temperature
Tolerates hot desert summers and cold winters typical of its native range; protect from prolonged hard frost.
How easy
Moderate
Native range
SW. U.S.A.

About

Tetradymia axillaris is a flowering plant in the daisy family known by the common names longspine horsebrush and cottonthorn. This is a plant of the sagebrush 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.

Other Tetradymia plants

Striped cottonthorn · Spineless horsebrush · Hairy horsebrush · Littleleaf horsebrush · Nuttall's horsebrush · Shortspine horsebrush · Mojave cottonthorn · Fourpart horsebrush · Horsebrush

Text excerpted from the Wikipedia article Tetradymia axillaris by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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