Species Details

Quercus dumosa

Nuttall's scrub oak

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Classification

Scientific Name: Quercus dumosa Nutt.
Common Name: Nuttall's scrub oak
Family:	Fagaceae
Element Code:	PDFAG050D0
USDA Plants Symbol:	QUDU
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G3
State Rank:	S3
Other Status:	BLM_S; IUCN_EN; SB_CRES; USFS_S
CRPR Changes:
Add Date:	1994-01-01
Date Edited:	2022-06-08

Ecology and Life History

Lifeform: perennial evergreen shrub

Blooming Period: Feb-Apr(May-Aug)

Elevation:
15 - 400 meters
50 - 1310 feet

General Habitats:

Closed-cone coniferous forest
Chaparral
Coastal scrub

Microhabitat Details:

Microhabitat:

Clay
Loam
Sandy

Notes

Notes: Threatened by development, fire suppression, and vegetation/fuels management. Possibly threatened by hybridization with Q. berberidifolia. Widespread scrub oak from much of cismontane CA, previously called Q. dumosa, is now Q. berberidifolia.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	12
	Total EOs	% of EOs
EOs with Threat Listed:	51	28 %
Development	33	18%
Road/trail construction/maint.	8	4%
Wood cutting or brush clearing	6	3%
Other	6	3%
Non-native plant impacts	5	2%
Recreational use (non-ORV)	4	2%
Improper burning regime	4	2%
Vandalism/dumping/litter	2	1%
ORV activity	2	1%
Foot traffic/trampling	2	1%
Agriculture	1	0%
Altered flood/tidal/hydrologic regime	1	0%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					180
A	B	C	D	X	U
11	14	14	3	3	135

Occurrence Status:
Historical >20 Years	70
Recent <=20 Years	110

Presence:
Presumed Extant	177
Possibly Extirpated	1
Presumed Extirpated	2

Location

California Endemic:

California Island:

States: Name (Code)
Baja California (BA), California (CA)

California Counties and Islands: Name (Code)
Los Angeles (LAX), Orange (ORA), San Diego (SDG), Santa Barbara (SBA), Ventura (VEN)

Quads: Name (Quad Code)
Alpine (3211677), Beverly Hills (3411814), Carpinteria (3411945), Dana Point (3311746), Del Mar (3211782), Dulzura (3211667), El Cajon (3211678), Encinitas (3311713), Escondido (3311711), Hollywood (3411813), Imperial Beach (3211751), Jamul Mountains (3211668), La Jolla (3211772), La Mesa (3211771), Laguna Beach (3311757), Las Pulgas Canyon (3311734), Margarita Peak (3311744), National City (3211761), Newbury Park (3411828), Oceanside (3311724), Otay Mesa (3211658), Otay Mountain (3211657), Point Dume (3411817), Point Loma (3211762), Poway (3211781), Rancho Santa Fe (3311712), San Juan Capistrano (3311756), San Luis Rey (3311723), San Marcos (3311722), Santa Barbara (3411946), Triunfo Pass (3411818), Viejas Mountain (3211676), White Ledge Peak (3411944)

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

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Rare Plant Inventory