Acanthoscyphus sp.
Family: Polygonaceae · Type: Annual · Variable; species dependent
Acanthoscyphus sp. is a non-native California annual in the Polygonaceae family.
How to tell it apart
vs Eriogonum: Acanthoscyphus has many-awned involucres (7-30+); Eriogonum has awnless involucres.; vs Sidotheca: Acanthoscyphus has entire petals and 7-30+ awns; Sidotheca has fringed petals and 5-6 awns.; vs Oxytheca: Acanthoscyphus has 7-30+ awns per involucre; Oxytheca has only 3-5 awns.
Frequently asked questions
Is Acanthoscyphus sp. native to California?
No. Acanthoscyphus sp. is not native to California (recorded as variable; species dependent).
What plant family does Acanthoscyphus sp. belong to?
Acanthoscyphus sp. is in the Polygonaceae family, genus Acanthoscyphus.
Related species
Other California species in the same genus, family, or bioregion.
- Acanthoscyphus parishii — Flowery puncturebract
- Acanthoscyphus parishii var. abramsii — Abrams' oxytheca
- Acanthoscyphus parishii var. cienegensis — Cienega seca oxytheca
- Acanthoscyphus parishii var. goodmaniana — Cushenbury oxytheca
- Acanthoscyphus parishii var. parishii — Parish's oxytheca
- Aconogonon davisiae — Davis knotweed
- Aconogonon newberryi — Newberry's smartweed
- Aconogonon phytolaccifolium — Pokeweed knotweed
- Aconogonon sp.
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.