Species Details

Dudleya cymosa ssp. marcescens

marcescent dudleya

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Species Description:

Dudleya cymosa ssp. marcescens, commonly known as marcescent dudleya, is a perennial herb in the Crassulaceae that is found only in California. It occurs within Chaparral, growing at elevations from 150 to 520 meters. Dudleya cymosa ssp. marcescens is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

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:
Name Status: JEP, FNA, POWO,
IPNI, Tropicos
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
Lifeform: perennial herb
Blooming Period: Apr-Jul
JFMAMJJASOND
Elevation:
150 - 520 meters
490 - 1705 feet
General Habitats:
  • Chaparral
Microhabitat Details:
Microhabitat:
  • Rocky
  • Volcanic
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 Total: 7
Total EOs % of EOs
EOs with Threat Listed: 8 57 %
THREAT LIST:
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%
Total Occurrences: 14
Element Occurrence Ranks:
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
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.
Presumed Extant
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