Species Details

Euphorbia ocellata ssp. rattanii

Stony Creek spurge

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Classification

Scientific Name: Euphorbia ocellata Durand & Hilg. ssp. rattanii (S. Watson) Oudejans
Common Name: Stony Creek spurge
Family:	Euphorbiaceae
Element Code:	PDEUP0D1P1
USDA Plants Symbol:
Synonyms/Other Names: Chamaesyce ocellata (Dur. & Hilg.) Millsp. ssp. rattanii (Wats.) Koutnik

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G4T2?
State Rank:	S2?
Other Status:	BLM_S
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: annual herb

Blooming Period: May-Oct

Elevation:
65 - 800 meters
215 - 2625 feet

General Habitats:

Chaparral
Riparian scrub (streambanks)
Valley and foothill grassland (sandy, rocky)

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened by foot trampling, recreational activities, and vehicles. Can be confused with ssp. ocellata. See Proceedings of the American Academy of Arts and Sciences 20:372 (1885) for original description, Phytologia 67(1):47 (1989) for revised nomenclature, and Taxon 55:397-420 (2006) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	8
	Total EOs	% of EOs
EOs with Threat Listed:	7	18 %
Foot traffic/trampling	4	10%
Grazing	4	10%
ORV activity	2	5%
Other	2	5%
Recreational use (non-ORV)	1	2%
Mining	1	2%
Altered flood/tidal/hydrologic regime	1	2%
Development	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					39
A	B	C	D	X	U
1	4	0	0	0	34

Occurrence Status:
Historical >20 Years	32
Recent <=20 Years	7

Presence:
Presumed Extant	39
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Glenn (GLE), Tehama (TEH)

Quads: Name (Quad Code)
Black Butte Dam (3912273), Chrome (3912265), Cold Fork (4012226), Corning (3912282), Elk Creek (3912255), Gerber (4012212), Hall Ridge (3912276), Henleyville (3912283), Inskip Hill (4012138), Kirkwood (3912272), Los Molinos (4012211), Lowrey (4012215), Newville (3912275), Paskenta (3912285), Raglin Ridge (4012216), Sehorn Creek (3912274), Stonyford (3912245)

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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Selected References

Other:

USFS Potential Species of Conservation Concern Profile