Taxon Details

Quercus parvula var. tamalpaisensis

Tamalpais oak

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Taxon Summary:

Quercus parvula var. tamalpaisensis, commonly known as Tamalpais oak, is a perennial evergreen shrub in the Fagaceae that is found only in California. It occurs within Lower montane coniferous forest, growing at elevations from 100 to 750 meters. Quercus parvula var. tamalpaisensis is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Quercus parvula Greene var. tamalpaisensis S.K. Langer
Common Name: Tamalpais oak
Family:	Fagaceae
Element Code:	PDFAG051Q3
USDA Plants Symbol:	QUPAT
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G4T2
State Rank:	S2
Other Status:
CRPR Changes:
Add Date:	2001-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial evergreen shrub

Blooming Period: Mar-Apr

Elevation:
100 - 750 meters
330 - 2460 feet

General Habitats:

Lower montane coniferous forest

Microhabitat Details:

Microhabitat:

Notes

Notes: Known only from Mt. Tamalpais. May hybridize with Q. wislizeni var. frutescens. Not in The Jepson Manual. See Four Seasons 9(3):21-30 (1993) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	5
	Total EOs	% of EOs
EOs with Threat Listed:	3	15 %
Road/trail construction/maint.	2	10%
Wood cutting or brush clearing	1	5%
Foot traffic/trampling	1	5%
Improper burning regime	1	5%
Other	1	5%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					20
A	B	C	D	X	U
0	2	0	1	0	17

Occurrence Status:
Historical >20 Years	12
Recent <=20 Years	8

Presence:
Presumed Extant	20
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Marin (MRN)

Quads: Name (Quad Code)
Bolinas (3712286), San Geronimo (3812216), San Rafael (3712285)

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