Taxon Details

Quercus durata var. gabrielensis

San Gabriel oak

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Taxon Summary:

Quercus durata var. gabrielensis, commonly known as San Gabriel oak, is a perennial evergreen shrub in the Fagaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 450 to 1000 meters. Quercus durata var. gabrielensis is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification

Scientific Name: Quercus durata Jeps. var. gabrielensis K. Nixon & C.H. Muller
Common Name: San Gabriel oak
Family:	Fagaceae
Element Code:	PDFAG050G2
USDA Plants Symbol:	QUDUG
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.2
Fed List:	None
State List:	None
Global Rank:	G4T3
State Rank:	S3
Other Status:
CRPR Changes:
Add Date:	2001-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial evergreen shrub

Blooming Period: Apr-May

Elevation:
450 - 1000 meters
1475 - 3280 feet

General Habitats:

Chaparral
Cismontane woodland

Microhabitat Details:

Microhabitat:

Notes

Notes: Known from the San Gabriel Mtns. Threatened by urbanization and powerline construction. See Novon 4(4):392 (1994) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	0 %

Occurrence Data from the CNDDB

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

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

Presence:
Presumed Extant	0
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), San Bernardino (SBD)

Quads: Name (Quad Code)
Acton (3411842), Agua Dulce (3411843), Azusa (3411728), Burbank (3411823), Chilao Flat (3411831), Condor Peak (3411832), Devore (3411724), Glendora (3411727), Mount San Antonio (3411736), Mt. Baldy (3411726), Mt. Wilson (3411821), Pacifico Mountain (3411841), Pasadena (3411822)

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