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Arabis rigidissima var. rigidissima
Common Name: Trinity Mountains rockcress
Family: Brassicaceae
Element Code: PDBRA061R2
Full Name: Arabis rigidissima Rollins var. rigidissima

Biology Glossary
Rarity Status Glossary
Occurrence Data from CDFW
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 6
  • Element Occurrence Ranks:
    A B C D X U
    0 1 0 0 0 5
  • Population Status:
    >20 yrs
    <=20 yrs
    4 2
  • Presence:
    Present Extant Possibly Extirpated Presumed Extirpated
    6 0 0
Notes Glossary
  • 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.
  • To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
  • Date Added: 1974-01-01
  • Last Update: 2015-07-23
Location Glossary
  • Elevation: 1190 - 2200 meters
  • California Endemic: yes
  • Other States:
  • California Counties and Islands:   name (code)
    Siskiyou (SIS),  Trinity (TRI)
  • Quads:   name (DWR code) USGS code
    Thurston Peaks (668B) 4012382,  Whisky Bill Peak (683D) 4112215,  Dees Peak (686D) 4112313,  Eaton Peak (701C) 4112238,  English Peak (702B) 4112342
  • Notes:
      Definitions of codes preceding a county and/or quad:
      * Presumed extirpated
      ? Uncertain about distribution or identity
      ?* Uncertain about distribution, but presumed extirpated if once present
      (?) Occurrence confirmed, but possibly extirpated
      Species may be present in other areas where conditions are favorable. This data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant Presumed Extirpated or Unknown 199
Links to Leading Resources of Taxon Information
Suggested Citation
California Native Plant Society, Rare Plant Program. . Inventory of Rare and Endangered Plants of California (online edition, v8-03). Website http://www.rareplants.cnps.org [accessed ].

4012382=Thurston Peaks (668B) 4012382;4112215=Whisky Bill Peak (683D) 4112215;4112313=Dees Peak (686D) 4112313;4112238=Eaton Peak (701C) 4112238;4112342=English Peak (702B) 4112342