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Irish Hills Spineflower

Chorizanthe aphanantha

Irish Hills Spineflower
Photo: Alex Heyman, CC0

Irish Hills Spineflower is a tiny, low-growing mat-forming annual wildflower native to a single area in San Luis Obispo County, California, and is critically endangered. It grows best in full sun on well-drained serpentine-type soil, and it is not a common garden plant.

Family
Polygonaceae (Buckwheat family)
Light
Full sun
Water
Water sparingly and allow the soil to dry out between waterings; it is adapted to dry chaparral conditions.
Soil
Well-drained, gritty or serpentine-like soil with low fertility.
Temperature
Tolerates Mediterranean-type temperatures; protect from hard frost.
How easy
Hard
Native range
California
Climate
temperate

About

Chorizanthe aphanantha is a critically endangered species of flowering plant in the family Polygonaceae with the common name Irish Hills Spineflower. It is endemic to the Irish Hills in San Luis Obispo County California.

Where it grows

Chorizanthe aphanantha grows in chaparral, usually on serpentine soils in the Irish Hills in San Luis Obispo County California.

Other Chorizanthe plants

Narrowleaf 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 · Ramona spineflower

Text excerpted from the Wikipedia article Chorizanthe aphanantha 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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