Species Details

Eriogonum truncatum

Mt. Diablo buckwheat

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Scientific Name:
Eriogonum truncatum T. & G.
Common Name:
Mt. Diablo buckwheat
Family: Polygonaceae
Element Code: PDPGN085Z0
USDA Plants Symbol: ERTR11
Synonyms/Other Names:
CA Rare Plant Rank: 1B.1
Fed List: None
State List: None
Global Rank: G1
State Rank:
S1
Other Status: SB_UCBG
CRPR Changes:
changed from 1A to 1B on 2005-07-01
Add Date: 1974-01-01
Date Edited: 2021-12-09
Lifeform: annual herb
Blooming Period: Apr-Sep(Nov-Dec)
Elevation:
3 - 350 meters
10 - 1150 feet
General Habitat:
  • Chaparral
  • Coastal scrub
  • Valley and foothill grassland
General Micro Habitat:
Micro Habitat:
  • Sandy
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.
Threats:
Taxonomy:
Other:
Total Occurrences: 7
Element Occurrence Ranks:
A B C D X U
1 0 0 0 1 5
Occurrence Status:
Historical >20 Years 5
Recent <=20 Years 2
Presence:
Presumed Extant 6
Possibly Extirpated 1
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Contra Costa (CCA), Solano (SOL)*
Quads: Name (Quad Code)
Antioch North (3812117)*, Antioch South (3712187)*, Clayton (3712188)?, Diablo (3712178)*, Fairfield South (3812221)*
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Map

Presumed Extant
Counties   Quads