CNPS Inventory Plant Detail

Oenothera deltoides ssp. howellii

Common Name:	Antioch Dunes evening-primrose
Family:	Onagraceae
Synonyms:
Element Code:	PDONA0C0B4
Full Name:	Oenothera deltoides Torr. & Frem. ssp. howellii (Munz) W. Klein
USDA PLANTS Symbol:	OEDEH

Biology
Lifeform: perennial herb Blooming Period: March - September Habitat: • Inland dunes

Rarity Status
CA Rare Plant Rank: 1B.1 Rare, threatened, or endangered in California and elsewhere .1: Seriously endangered in California Federal Listing Status: FE Endangered (04/26/78) State Listing Status: CE Endangered (11/78) State Rank: S1 S1: Critically Imperiled. Global Rank: G5T1 T1: Critically Imperiled. G5: (species) Secure, considering populations outside California.

Occurrence Data from DFG
California Natural Diversity Database

Historic >20 yrs	Recent <=20 yrs
3	6

Presence:

Present Extant	Possibly Extirpated	Extirpated
9	0	0

Notes

Occurrences from SAC Co. (480C) and CCA Co. (481C) are introduced. Seriously threatened by mining, agriculture, industrial development, and non-native plants. Recovery work in progress. Protected in part at Antioch Dunes NWR (USFWS). See Aliso 2:81 (1949) for original description, Four Seasons 3(1):2-4 (1969) for threat information, and Biological Conservation 65:257-278 (1993) for population biology.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1974-01-01
Last Update: 2012-06-15

Location

Elevation: 0 - 30 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Contra Costa (CCA), Sacramento (SAC)

Quads: name (DWR code) USGS code
Clayton (464B) 37121H8, Jersey Island (480C) 38121A6, Honker Bay (481C) 38121A8, Antioch North (481D) 38121A7

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

1179

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-121.75,38.0