Taxon Details

Dudleya cymosa ssp. crebrifolia

San Gabriel River dudleya

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Taxon Summary:

Dudleya cymosa ssp. crebrifolia, commonly known as San Gabriel River dudleya, is a perennial herb in the Crassulaceae that is found only in California. It occurs within Chaparral, growing at elevations from 275 to 457 meters. Dudleya cymosa ssp. crebrifolia is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Dudleya cymosa (Lem.) Britt. & Rose ssp. crebrifolia K. Nakai & Verity
Common Name: San Gabriel River dudleya
Family:	Crassulaceae
Element Code:	PDCRA040A8
USDA Plants Symbol:	DUCYC2
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G5T2
State Rank:	S2
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:
Add Date:	1988-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Apr-Jul

Elevation:
275 - 457 meters
900 - 1500 feet

General Habitats:

Chaparral (granitic)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known only from the type locality along the San Gabriel River. Threatened by mining. See Madroño 34(4):334-353 (1987) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	1	17 %
Erosion/runoff	1	16%
Road/trail construction/maint.	1	16%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					6
A	B	C	D	X	U
2	0	0	0	0	4

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	6

Presence:
Presumed Extant	6
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)

Quads: Name (Quad Code)
Azusa (3411728), Crystal Lake (3411737)

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