Taxon Details

Euphorbia platysperma

flat-seeded spurge

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Taxon Summary:

Euphorbia platysperma, commonly known as flat-seeded spurge, is a annual herb in the Euphorbiaceae that is found in California and elsewhere. It occurs within Desert dunes, and Sonoran desert scrub (sandy), growing at elevations from 65 to 100 meters. Euphorbia platysperma is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Euphorbia platysperma Engelm.
Common Name: flat-seeded spurge
Family:	Euphorbiaceae
Element Code:	PDEUP0D1X0
USDA Plants Symbol:
Synonyms/Other Names: Chamaesyce platysperma (Engelm.) Shinners
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G3
State Rank:	S1
Other Status:	BLM_S; SB_CalBG/RSABG
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: Feb-Sep

Elevation:
65 - 100 meters
215 - 330 feet

General Habitats:

Desert dunes
Sonoran desert scrub (sandy)

Microhabitat Details:

Microhabitat:

Notes

Notes: See Geological Survey of California, Botany 2:482-483 (1880) for original description, Desert Plants 2(2):104-105 (1980) for species account, and Taxon 55:397-420 (2006) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					3
A	B	C	D	X	U
0	0	0	0	0	3

Occurrence Status:
Historical >20 Years	3
Recent <=20 Years	0

Presence:
Presumed Extant	3
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Arizona (AZ), California (CA), Sonora, Mexico (SO)

California Counties and Islands: Name (Code)
Imperial (IMP), Riverside (RIV), San Bernardino (SBD)?

Quads: Name (Quad Code)
Cathedral City (3311674), Myoma (3311673), Old Woman Springs (3411646)?, Superstition Mtn. (3211587)

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.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory