Anulocaulis sp.
Ringstem, Ringstem
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Family: Nyctaginaceae · Type: Perennial · Variable; species dependent
Anulocaulis sp. (Ringstem) is a non-native California perennial in the Nyctaginaceae family.
How to tell it apart
vs Phacelia: Anulocaulis has smooth fruits with barely visible ribs; Phacelia has bristly/hairy capsules that split open.; vs Abronia: Anulocaulis has erect stems over 7mm thick; Abronia has trailing or prostrate stems under 5mm.; vs Tripterocalyx: Anulocaulis fruits are smooth with inconspicuous ribs; Tripterocalyx fruits have three prominent papery wings.; vs Allionia: Anulocaulis has thick erect stems over 7mm; Allionia has slender spreading or trailing stems.; vs Mirabilis: Anulocaulis has free bracts below flowers; Mirabilis bracts are fused into a cup around flowers.
Frequently asked questions
Is Anulocaulis sp. native to California?
No. Anulocaulis sp. is not native to California (recorded as variable; species dependent).
What plant family does Anulocaulis sp. belong to?
Anulocaulis sp. is in the Nyctaginaceae family, genus Anulocaulis.
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.