Taxon Details

Dudleya attenuata ssp. attenuata

Orcutt's dudleya

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Taxon Summary:

Dudleya attenuata ssp. attenuata, commonly known as Orcutt's dudleya, is a perennial herb in the Crassulaceae that is found in California and elsewhere. It occurs within Chaparral, Coastal bluff scrub, and Coastal scrub, growing at elevations from 3 to 50 meters. Dudleya attenuata ssp. attenuata is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Dudleya attenuata (S. Watson) Moran ssp. attenuata
Common Name: Orcutt's dudleya
Family:	Crassulaceae
Element Code:	PDCRA04032
USDA Plants Symbol:
Synonyms/Other Names: Dudleya attenuata ssp. orcuttii
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.1
Fed List:	None
State List:	None
Global Rank:	G4T1T2
State Rank:	S1
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2025-10-29

Ecology and Life History

Lifeform: perennial herb

Blooming Period: May-Jul

Elevation:
3 - 50 meters
10 - 165 feet

General Habitats:

Coastal bluff scrub
Chaparral
Coastal scrub

Microhabitat Details:

Microhabitat:

Gravelly (sometimes)
Rocky (sometimes)

Notes

Notes: Known in CA only from Border Field SP. Possibly threatened by trampling and Border Patrol activities. See Bulletin of the New York Botanical Garden 3:36 (1903) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	5
	Total EOs	% of EOs
EOs with Threat Listed:	1	100 %
Development	1	100%
Foot traffic/trampling	1	100%
Military operations	1	100%
Recreational use (non-ORV)	1	100%
Road/trail construction/maint.	1	100%

Occurrence Data from the CNDDB

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

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	1

Presence:
Presumed Extant	1
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Baja California (BA), California (CA)

California Counties and Islands: Name (Code)
San Diego (SDG)

Quads: Name (Quad Code)
Imperial Beach (3211751)

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