Taxon Details

Arabis rigidissima var. demota

Galena Creek rockcress

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Taxon Summary:

Arabis rigidissima var. demota, commonly known as Galena Creek rockcress, is a perennial herb in the Brassicaceae that is found in California and elsewhere. It occurs within Broadleafed upland forest, and Upper montane coniferous forest, growing at elevations from 2255 to 2560 meters. Arabis rigidissima var. demota is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Arabis rigidissima Rollins var. demota Rollins
Common Name: Galena Creek rockcress
Family:	Brassicaceae
Element Code:	PDBRA061R1
USDA Plants Symbol:	ARRID
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:	G3T3Q
State Rank:	S1
Other Status:	USFS_S
CRPR Changes:
Add Date:	1994-01-01
Date Edited:	2021-07-14

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jul-Aug

Elevation:
2255 - 2560 meters
7400 - 8400 feet

General Habitats:

Broadleafed upland forest
Upper montane coniferous forest

Microhabitat Details:

Microhabitat:

Rocky

Notes

Notes: Threatened by logging and fuel reduction projects. On watch list in NV. Not in TJM (1993) and TJM 2. See Journal of the Arnold Arboretum 64:498 (1983) for original description, and Novon 13(4):381-391 (2003) for revised nomenclature.
Threats: Threatened by logging and fuel reduction projects.
Taxonomy: Not in TJM (1993) and TJM 2.

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	7
	Total EOs	% of EOs
EOs with Threat Listed:	6	86 %
Foot traffic/trampling	2	28%
Logging	2	28%
ORV activity	2	28%
Recreational use (non-ORV)	2	28%
Wood cutting or brush clearing	2	28%
Development	1	14%
Road/trail construction/maint.	1	14%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					7
A	B	C	D	X	U
1	0	5	0	0	1

Occurrence Status:
Historical >20 Years	1
Recent <=20 Years	6

Presence:
Presumed Extant	7
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Nevada (NV)

California Counties and Islands: Name (Code)
El Dorado (ELD), Placer (PLA)

Quads: Name (Quad Code)
Martis Peak (3912031), South Lake Tahoe (3811988), Tahoe City (3912022)

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