Taxon Report

Dudleya cymosa (Lemaire) Britton & Rose ssp. agourensis K. Nakai

Agoura Hills dudleya

Print Report

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:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Jun	May-Jun
Elevation:	200-500 (655-1640)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:	Rocky, Volcanic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G5T1
State Rank:	S1
State List:	None
Fed List:	FT
Other Status:	SB_CalBG/RSABG; SB_SBBG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	8
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	3
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	3

Location


California Endemic: True
California Counties and Islands: Name (Code)
Los Angeles (LAX), Ventura (VEN)
Quads: Name (Quad Code)
Point Dume (3411817), Thousand Oaks (3411827)

Threat List Data from the CNDDB


Threat List Total:	6
EOs with Threat Listed:	Total EOs	% of EOs
	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%

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.

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 November 2025].