Taxon Details

Dudleya cymosa ssp. agourensis

Agoura Hills dudleya

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Taxon Summary:

Dudleya cymosa ssp. agourensis, commonly known as Agoura Hills dudleya, is a perennial herb in the Crassulaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 200 to 500 meters. Dudleya cymosa ssp. agourensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Dudleya cymosa (Lemaire) Britton & Rose ssp. agourensis K. Nakai
Common Name: Agoura Hills dudleya
Family:	Crassulaceae
Element Code:	PDCRA040A7
USDA Plants Symbol:	DUCYA
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	FT (1997-01-29)
State List:	None
Global Rank:	G5T1
State Rank:	S1
Other Status:	SB_CalBG/RSABG; SB_SBBG
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2025-05-06

Ecology and Life History

Lifeform: perennial herb

Blooming Period: May-Jun

Elevation:
200 - 500 meters
655 - 1640 feet

General Habitats:

Chaparral
Cismontane woodland

Microhabitat Details:

Microhabitat:

Rocky
Volcanic

Notes

Notes: Known only from the western Santa Monica Mtns.
Threats: Threatened by development. Possibly threatened by foot traffic.
Taxonomy: A synonym of D. cymosa ssp. ovatifolia in The Jepson Manual; USFWS also uses this name. See Madroño 34(4):339 (1987) for original description.

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	6
	Total EOs	% of EOs
EOs with Threat Listed:	5	63 %
Foot traffic/trampling	3	37%
Development	3	37%
Erosion/runoff	2	25%
Non-native plant impacts	2	25%
Road/trail construction/maint.	1	12%
Vandalism/dumping/litter	1	12%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					8
A	B	C	D	X	U
2	3	0	0	0	3

Occurrence Status:
Historical >20 Years	3
Recent <=20 Years	5

Presence:
Presumed Extant	8
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Los Angeles (LAX), Ventura (VEN)

Quads: Name (Quad Code)
Point Dume (3411817), Thousand Oaks (3411827)

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