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Oneawn spineflower

Chorizanthe uniaristata

Also called One Awn Spineflower

Oneawn spineflower
Photo: Alex Heyman, CC0

A small annual wildflower native to central California, grown mainly in native plant gardens and restoration plantings rather than as a common ornamental. It needs sun and very free-draining soil, and it suits dry, sandy or gravelly conditions.

Family
Polygonaceae (Buckwheat family)
Grows as
Annual
Light
Full sun
Water
Water lightly during establishment and then let it rely on winter and spring rain; avoid wet soil.
Soil
Sandy or gravelly, fast-draining soil; poor soil suits it.
Temperature
Tolerates cool winters and warm dry summers typical of its native range; protect from hard frost.
How easy
Easy
Native range
W. & SC. California
Climate
temperate

About

Chorizanthe uniaristata is a species of flowering plant in the family Polygonaceae known by the common name one-awn spineflower. It is endemic to central California, where it is known from several of the local mountain ranges, as well as the Central Coast.

It grows in sandy, gravelly, and rocky soils in chaparral and woodland. This plant has upright or decumbent stems up to about 25 centimeters in length. It is hairy and gray, green, or reddish in color. The inflorescence is a cluster of flowers, with each flower surrounded by an array of six hairy bracts. One bract is much longer than the others and has a long, straight awn; the other bracts have hooked awns. The flower is 2 or 3 millimeters long and usually white.

Other Chorizanthe plants

Narrowleaf spineflower · Irish Hills Spineflower · Twolobe spineflower · Blakley's spineflower · Brittle spineflower · San Luis Obispo spineflower · Wrinkled spineflower · San Francisco spineflower · Diffuse spineflower · Douglas' spineflower · Fringed spineflower · Mendocino spineflower

Text excerpted from the Wikipedia article Chorizanthe uniaristata 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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