Taxon Details
Euphorbia ocellata ssp. rattanii
Stony Creek spurge
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Taxon Summary:
Euphorbia ocellata ssp. rattanii, commonly known as Stony Creek spurge, is a annual herb in the Euphorbiaceae that is found only in California. It occurs within Chaparral, Riparian scrub (streambanks), Valley and foothill grassland (sandy, and rocky), growing at elevations from 65 to 800 meters. Euphorbia ocellata ssp. rattanii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Euphorbia ocellata Durand & Hilg. ssp. rattanii (S. Watson) Oudejans |
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Common Name: Stony Creek spurge |
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| Family: | Euphorbiaceae | |
| Element Code: | PDEUP0D1P1 | |
| USDA Plants Symbol: | ||
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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.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G4T2? |
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State Rank: |
S2? |
| Other Status: | BLM_S |
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CRPR Changes: |
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| Add Date: | 1980-01-01 |
| Date Edited: | 2021-05-26 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: May-Oct
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Elevation:
65 - 800 meters 215 - 2625 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: Threatened by foot trampling, recreational activities, and vehicles. Can be confused with ssp. ocellata. See Proceedings of the American Academy of Arts and Sciences 20:372 (1885) for original description, Phytologia 67(1):47 (1989) for revised nomenclature, and Taxon 55:397-420 (2006) for taxonomic treatment. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 8 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 7 | 18 % |
| THREAT LIST: | ||
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| Foot traffic/trampling | 4 | 10% |
| Grazing | 4 | 10% |
| ORV activity | 2 | 5% |
| Other | 2 | 5% |
| Recreational use (non-ORV) | 1 | 2% |
| Mining | 1 | 2% |
| Altered flood/tidal/hydrologic regime | 1 | 2% |
| Development | 1 | 2% |
| Total Occurrences: | 39 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 4 | 0 | 0 | 0 | 34 |
| Occurrence Status: | |||||
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| Historical >20 Years | 32 | ||||
| Recent <=20 Years | 7 | ||||
| Presence: | |||||
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| Presumed Extant | 39 | ||||
| Possibly Extirpated | 0 | ||||
| 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) Glenn (GLE), Tehama (TEH) |
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Quads: Name (Quad Code) Black Butte Dam (3912273), Chrome (3912265), Cold Fork (4012226), Corning (3912282), Elk Creek (3912255), Gerber (4012212), Hall Ridge (3912276), Henleyville (3912283), Inskip Hill (4012138), Kirkwood (3912272), Los Molinos (4012211), Lowrey (4012215), Newville (3912275), Paskenta (3912285), Raglin Ridge (4012216), Sehorn Creek (3912274), Stonyford (3912245) |
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Notes:
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Presumed Extant
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