Taxon Details
Oenothera deltoides ssp. howellii
Antioch Dunes evening-primrose
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Taxon Summary:
Oenothera deltoides ssp. howellii, commonly known as Antioch Dunes evening-primrose, is a perennial herb in the Onagraceae that is found only in California. It occurs within Inland dunes, growing at elevations from 0 to 30 meters. Oenothera deltoides ssp. howellii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Oenothera deltoides Torr. & Frem. ssp. howellii (Munz) W. Klein |
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Common Name: Antioch Dunes evening-primrose |
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| Family: | Onagraceae | |
| Element Code: | PDONA0C0B4 | |
| USDA Plants Symbol: | OEDEH | |
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | FE (1978-05-27) |
| State List: | CE (1978-11-01) |
| Global Rank: | G5T1 |
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State Rank: |
S1 |
| Other Status: | SB_CalBG/RSABG; SB_UCBG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2023-06-06 |
| Lifeform: perennial herb | ||||||||||||||
Blooming Period: Mar-Sep
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Elevation:
0 - 30 meters 0 - 100 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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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. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 7 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 6 | 60 % |
| THREAT LIST: | ||
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| Non-native plant impacts | 4 | 40% |
| Other | 2 | 20% |
| Development | 2 | 20% |
| Mining | 2 | 20% |
| Biocides | 1 | 10% |
| Foot traffic/trampling | 1 | 10% |
| Recreational use (non-ORV) | 1 | 10% |
| Total Occurrences: | 10 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 0 | 4 | 1 | 1 | 4 |
| Occurrence Status: | |||||
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| Historical >20 Years | 6 | ||||
| Recent <=20 Years | 4 | ||||
| Presence: | |||||
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| Presumed Extant | 9 | ||||
| Possibly Extirpated | 1 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Contra Costa (CCA), Sacramento (SAC) |
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Quads: Name (Quad Code) Antioch North (3812117), Brentwood (3712186), Clayton (3712188), Honker Bay (3812118), Jersey Island (3812116), Walnut Creek (3712281) |
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Notes:
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Presumed Extant
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