Taxon Details
Eschscholzia rhombipetala
diamond-petaled California poppy
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© 2017 Chris Winchell |
© 2017 Chris Winchell |
© 2017 Chris Winchell |
Taxon Summary:
Eschscholzia rhombipetala, commonly known as diamond-petaled California poppy, is a annual herb in the Papaveraceae that is found only in California. It occurs within Valley and foothill grassland (alkaline, and clay), growing at elevations from 0 to 975 meters. Eschscholzia rhombipetala is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Eschscholzia rhombipetala Greene |
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Common Name: diamond-petaled California poppy |
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| Family: | Papaveraceae | |
| Element Code: | PDPAP0A0D0 | |
| USDA Plants Symbol: | ESRH | |
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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: | None |
| State List: | None |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | BLM_S; SB_CalBG/RSABG; SB_UCBG |
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CRPR Changes: |
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| Add Date: | 1980-01-01 |
| Date Edited: | 2025-10-29 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Mar-Apr
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Elevation:
0 - 975 meters 0 - 3200 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: Rediscovered on Carrizo Plain by David Keil in 1992. Also found at Lawrence Livermore Laboratory Site 300, ALA Co. in 1997. Historical occurrence for SJQ Co. from literature lacks documentation; occurrence from La Panza, SLO Co. (244C) probably misidentified E. lemmonii ssp. lemmonii. See Madroño 47(2):138 (2000) for ALA Co. occurrence information and 50(1):1-7 (2003) for population characteristics information. |
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Threats: Threatened by agriculture and grazing. |
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Taxonomy: |
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| Threat List Total: | 6 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 6 | 50 % |
| THREAT LIST: | ||
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| Agriculture | 3 | 25% |
| Erosion/runoff | 2 | 16% |
| Grazing | 2 | 16% |
| Non-native plant impacts | 1 | 8% |
| Recreational use (non-ORV) | 1 | 8% |
| Foot traffic/trampling | 1 | 8% |
| Total Occurrences: | 12 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 3 | 2 | 0 | 2 | 4 |
| Occurrence Status: | |||||
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| Historical >20 Years | 9 | ||||
| Recent <=20 Years | 3 | ||||
| Presence: | |||||
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| Presumed Extant | 10 | ||||
| Possibly Extirpated | 2 | ||||
| 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) Alameda (ALA), Colusa (COL)*, Contra Costa (CCA)*, Kern (KRN), San Joaquin (SJQ), San Luis Obispo (SLO), Stanislaus (STA)* |
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Quads: Name (Quad Code) Antioch North (3812117)*, Antioch South (3712187), Byron Hot Springs (3712176)*, California Valley (3512031), Chimineas Ranch (3511928), Chimney Canyon (3512012), Clifton Court Forebay (3712175), La Panza (3512032)?*, Las Yeguas Ranch (3511948)*, Lodoga (3912234), Midway (3712165), Patterson (3712142)*, Simmler (3511938), Tracy (3712164), Westley (3712152) |
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Notes:
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Presumed Extant
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