Petalonyx sp.
Sandpaper-plant, Sandpaper-Plant
Family: Loasaceae · Type: Shrub · Native
Petalonyx sp. (Sandpaper-plant) is a native California shrub in the Loasaceae family.
How to tell it apart
vs Ambrosia: Petalonyx has showy white 5-petaled flowers; Ambrosia has tiny greenish flowers in heads.; vs Atriplex: Petalonyx has 5-petaled flowers; Atriplex has no petals, only sepals.; vs Eriastrum: Petalonyx has 5 stamens and woody stems; Eriastrum has many stamens and herbaceous stems.; vs Galium: Petalonyx has 5-petaled flowers; Galium has 4-petaled flowers in whorls.; vs Eucnide: Petalonyx is a woody shrub; Eucnide is an annual herb.
Frequently asked questions
Is Petalonyx sp. native to California?
Yes. Petalonyx sp. is native to California (recorded as native).
What plant family does Petalonyx sp. belong to?
Petalonyx sp. is in the Loasaceae family, genus Petalonyx.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CalPhotos
Last updated 2026-04-14
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.