Species Details
Eriogonum truncatum
Mt. Diablo buckwheat
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Species Description:
Eriogonum truncatum, commonly known as Mt. Diablo buckwheat, is a annual herb in the Polygonaceae that is found only in California. It occurs within Chaparral, Coastal scrub, and Valley and foothill grassland, growing at elevations from 3 to 350 meters. Eriogonum truncatum is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Eriogonum truncatum T. & G. |
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Common Name: Mt. Diablo buckwheat |
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| Family: | Polygonaceae | |
| Element Code: | PDPGN085Z0 | |
| USDA Plants Symbol: | ERTR11 | |
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Synonyms/Other Names: |
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| Name Status: |
JEP, 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: | SB_UCBG |
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CRPR Changes: changed from 1A to 1B on 2005-07-01 |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2021-12-09 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Apr-Sep(Nov-Dec)
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Elevation:
3 - 350 meters 10 - 1150 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: Rediscovered in May 2005 by Michael Park in Mount Diablo SP; now known from one extant occurrence for which quad location needs confirmation. Potentially threatened by trampling and non-native plants. Much habitat eliminated by urbanization. See Proceedings of the American Academy of Arts and Sciences 8:173 (1870) for original description, and Phytologia 66(4):375-376 (1989) for taxonomic treatment. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 2 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 2 | 29 % |
| THREAT LIST: | ||
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| Development | 1 | 14% |
| Non-native plant impacts | 1 | 14% |
| Total Occurrences: | 7 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 0 | 0 | 0 | 1 | 5 |
| Occurrence Status: | |||||
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| Historical >20 Years | 5 | ||||
| Recent <=20 Years | 2 | ||||
| Presence: | |||||
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| Presumed Extant | 6 | ||||
| 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), Solano (SOL)* |
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Quads: Name (Quad Code) Antioch North (3812117)*, Antioch South (3712187)*, Clayton (3712188)?, Diablo (3712178)*, Fairfield South (3812221)* |
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Notes:
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Presumed Extant
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