CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record eriogonum_truncatum - Wed, Dec. 8, 2021, 05:36 ET b
Eriogonum truncatum
common nameMt. Diablo buckwheat
CalPhotos image
more photos
© University and Jepson Herbaria  Follow image link for photo data.
life formannual herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S1      ranking system key
global rank
G1     G1: Less than 6 occurrences OR less than 1,000 individuals OR less than 2,000 acres.
Where did the "RED" code go?
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (5):
Antioch South (464A)* 3712187, Clayton (464B)? 3712188, Diablo (464C)* 3712178, Antioch North (481D)* 3812117, Fairfield South (482A)* 3812221
quad data info

Counties, states, regions:
Alameda (ALA), Contra Costa (CCA), Solano (SOL)*
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Chaparral (Chprl)
•Coastal scrub (CoScr)
•Valley and foothill grassland (VFGrs)/sandy
blooming period Apr-Sep(Nov),(Dec),   Months in parentheses are uncommon.
elevation range3 - 350 meters
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.
full nameEriogonum truncatum T. & G.
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  ERTR11 Element Code  PDPGN085Z0
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Wed, Dec. 8, 2021 from

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