CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record eschscholzia_rhombipetala - Fri, Nov. 26, 2021 21:37 ET c
Eschscholzia rhombipetala
common namediamond-petaled California poppy
Inventory image more photos more photos
©1992 David Keil
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 (14):
Las Yeguas Ranch (243B)* 3511948, Simmler (243C) 3511938, La Panza (244C)?* 3512032, California Valley (244D) 3512031, Patterson (424B)* 3712142, Westley (443C)* 3712152, Tracy (444B) 3712164, Midway (445A) 3712165, Byron Hot Springs (463C)* 3712176, Clifton Court Forebay (463D) 3712175, Antioch South (464A)* 3712187, Antioch North (481D)* 3812117, Lodoga (563C) 3912234, Sites (563D)* 3912233
quad data info

Counties, states, regions:
Alameda (ALA), Contra Costa (CCA)*, Colusa (COL)*, San Joaquin (SJQ), San Luis Obispo (SLO), Stanislaus (STA)*
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Valley and foothill grassland (VFGrs)(alkaline, clay)
blooming period Mar-Apr  
elevation range0 - 975 meters
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. Threatened by agriculture and grazing. See Madroņo 47(2):138 (2000) for ALA Co. occurrence information and 50(1):1-7 (2003) for population characteristics information.
full nameEschscholzia rhombipetala Greene
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  ESRH Element Code  PDPAP0A0D0
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 Fri, Nov. 26, 2021 from

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