Caryophyllaceae

Onyxflower

Achyronychia cooperi A.Gray

Family: Caryophyllaceae
Genus: Achyronychia

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Onyxflower: Achyronychia cooperi near route 190 between Willow Creek and Ashford Junction, Death Valley National Park — Photo: Stan Shebs, CC BY-SA 3.0, from Wikimedia Commons

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Common names

By language (5)

Croatian: Achyronychia
Dutch: Achyronychia
English: Onyxflower
Portuguese: Achyronychia
Spanish: Achyronychia

Characteristics

Growth habit: Forb/herb
Lifespan: Annual
In the US and Canada: Lower 48 states: native

Photos

Photo: Stan Shebs, CC BY-SA 3.0, from Wikimedia Commons
Photo: Stan Shebs, CC BY-SA 3.0, from Wikimedia Commons
Photo: Stan Shebs, CC BY-SA 3.0, from Wikimedia Commons
Photo: Stan Shebs, CC BY-SA 3.0, from Wikimedia Commons
Photo: Stan Shebs, CC BY-SA 3.0, from Wikimedia Commons
Photo: Stan Shebs, CC BY-SA 3.0, from Wikimedia Commons
Photo: Stan Shebs, CC BY-SA 3.0, from Wikimedia Commons

Sources: classification from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.