Species Details

Dudleya cymosa ssp. marcescens

marcescent dudleya

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Classification

Scientific Name: Dudleya cymosa (Lem.) Britt. & Rose ssp. marcescens Moran
Common Name: marcescent dudleya
Family:	Crassulaceae
Element Code:	PDCRA040A3
USDA Plants Symbol:	DUCYM
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	FT (1997-01-29)
State List:	CR (1978-11-01)
Global Rank:	G5T2
State Rank:	S2
Other Status:	SB_CalBG/RSABG; SB_SBBG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Apr-Jul

Elevation:
150 - 520 meters
490 - 1705 feet

General Habitats:

Chaparral

Microhabitat Details:

Microhabitat:

Rocky
Volcanic

Notes

Notes: Known from fewer than 10 occurrences in the Santa Monica Mtns. Threatened by development and foot traffic. See Madroño 14(3):106 (1957) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	7
	Total EOs	% of EOs
EOs with Threat Listed:	8	57 %
Recreational use (non-ORV)	5	35%
Foot traffic/trampling	4	28%
Non-native plant impacts	2	14%
Development	2	14%
Road/trail construction/maint.	1	7%
Over-collecting/poaching	1	7%
Improper burning regime	1	7%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					14
A	B	C	D	X	U
1	7	1	0	0	5

Occurrence Status:
Historical >20 Years	5
Recent <=20 Years	9

Presence:
Presumed Extant	14
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)
Malibu Beach (3411816), Newbury Park (3411828), Point Dume (3411817), Triunfo Pass (3411818)

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