Oenothera deltoides subsp. julpunensis
Bay Miwok evening primrose
Photo: parent species Oenothera deltoides · no rights reserved · CC0
Family: Onagraceae · Type: Annual · Native
Conservation status: CNPS 1B.1
Oenothera deltoides subsp. julpunensis (Bay Miwok evening primrose) is a native California annual in the Onagraceae family.
Bay Miwok evening primrose is a California native annual herb found in the Great Valley bioregion, growing in loose sandy soils of inland dunes at elevations of 5 to 15 meters. It flowers from April to June.
Habitat and range
Habitat: Inland dunes; loose sandy soils
Elevation: 5-15 m
Bloom period
Oenothera deltoides subsp. julpunensis blooms Apr-Jun.
Conservation status
CNPS 1B.1
How to tell it apart
vs Camissoniopsis: Oenothera has a 4-lobed cross-shaped stigma; Camissoniopsis has a round stigma and four-angled fruits.; vs Clarkia: Oenothera has 4-lobed stigma and yellow flowers; Clarkia has round stigma and pink/purple flowers.; vs Rosa: Oenothera has 4 petals and capsule fruits; Rosa has 5+ petals and rose hips.; vs Convolvulus: Oenothera has separate petals; Convolvulus has fused trumpet-shaped flowers (morning glory family).; vs Taraxia: Oenothera has robust stems with 4-lobed stigma; Taraxia is stemless with flowers at ground level.
Frequently asked questions
Is Oenothera deltoides subsp. julpunensis native to California?
Yes. Oenothera deltoides subsp. julpunensis is native to California (recorded as native).
When does Oenothera deltoides subsp. julpunensis bloom?
Oenothera deltoides subsp. julpunensis blooms Apr-Jun.
What plant family does Oenothera deltoides subsp. julpunensis belong to?
Oenothera deltoides subsp. julpunensis is in the Onagraceae family, genus Oenothera.
Is Oenothera deltoides subsp. julpunensis rare or endangered?
Oenothera deltoides subsp. julpunensis carries California Rare Plant Rank 1B.1, state rank S1.
What habitat does Oenothera deltoides subsp. julpunensis grow in?
Oenothera deltoides subsp. julpunensis grows in Inland dunes; loose sandy soils.
Related species
Other California species in the same genus, family, or bioregion.
Last updated 2026-09-30
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.