Species Details

Arabis rigidissima var. rigidissima

Trinity Mountains rockcress

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Photo by ©2015 Dana York  max-height:128px; max-width:145px;
©2015 Dana York
Photo by ©2015 Dana York  max-height:128px; max-width:145px;
©2015 Dana York
Scientific Name:
Arabis rigidissima Rollins var. rigidissima
Common Name:
Trinity Mountains rockcress
Family: Brassicaceae
Element Code: PDBRA061R2
USDA Plants Symbol: ARRIR
Synonyms/Other Names:
CA Rare Plant Rank: 1B.3
Fed List: None
State List: None
Global Rank: G3T3
State Rank:
S3
Other Status:
CRPR Changes:
changed from 4.3 to 1B.3 on 2012-05-07
Add Date: 1974-01-01
Date Edited: 2021-05-26
Lifeform: perennial herb
Blooming Period: Jun-Aug
Elevation:
1190 - 2200 meters
3905 - 7220 feet
General Habitat:
  • Upper montane coniferous forest (gravelly, rocky)
General Micro Habitat:
Micro Habitat:
Notes:
Similar to Boechera suffrutescens. See Boechera rigidissima in TJM 2; varieties not treated. See Rhodora 43(511):380-381 (1941) for original description, and Novon 13(4):381-391 (2003) for revised nomenclature.
Threats:
Taxonomy:
Similar to Boechera suffrutescens. See Boechera rigidissima in TJM 2; varieties not treated.
Other:
Total Occurrences: 6
Element Occurrence Ranks:
A B C D X U
0 1 0 0 0 5
Occurrence Status:
Historical >20 Years 4
Recent <=20 Years 2
Presence:
Presumed Extant 6
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Carrville (4112216), Cecil Lake (4112312), Dees Peak (4112313), Eaton Peak (4112238), English Peak (4112342), Thurston Peaks (4012382), Whisky Bill Peak (4112215)
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.

Map

Presumed Extant
Counties   Quads