Species Details

Arabis aculeolata

Waldo rockcress

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Photo of Arabis aculeolata
© 2020 John Doyen
Photo of Arabis aculeolata
© 2008 Keir Morse
Photo of Arabis aculeolata
© 2021 Scot Loring
Scientific Name:
Arabis aculeolata Greene
Common Name:
Waldo rockcress
Family: Brassicaceae
Element Code: PDBRA06010
USDA Plants Symbol: ARAC4
Synonyms/Other Names:
CA Rare Plant Rank: 2B.2
Fed List: None
State List: None
Global Rank: G4
State Rank:
S2
Other Status: SB_BerrySB
CRPR Changes:
changed from 2.2 to 2B.2 on 2012-04-11
Add Date: 1980-01-01
Date Edited: 2023-05-02
Lifeform: perennial herb
Blooming Period: Apr-Jun
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Elevation:
410 - 1800 meters
1345 - 5905 feet
General Habitats:
  • Broadleafed upland forest
  • Lower montane coniferous forest
  • Upper montane coniferous forest
Microhabitat Details:
Microhabitat:
  • Serpentine
Notes:
On watch list in OR. 
Threats:
Threatened by logging and mining.
Taxonomy:
Not in TJM 2.
Threat List Total: 2
Total EOs % of EOs
EOs with Threat Listed: 2 25 %
THREAT LIST:
Logging 2 25%
Erosion/runoff 1 12%
Total Occurrences: 8
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 8
Occurrence Status:
Historical >20 Years 6
Recent <=20 Years 2
Presence:
Presumed Extant 8
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA), Oregon (OR)
California Counties and Islands: Name (Code)
Del Norte (DNT), Siskiyou (SIS)
Quads: Name (Quad Code)
Clear Creek (4112364), Devils Punchbowl (4112376), Hamburg (4112371), High Divide (4112481), High Plateau Mtn. (4112388), Kangaroo Mtn. (4112382), Preston Peak (4112375), Shelly Creek Ridge (4112387)
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.
Presumed Extant
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CNPS Status Review: Proposed retention as CRPR 2.2 (2012)
Original Description: Leaflets of Botanical Observation and Criticism 2:69-88 (1910)
Taxonomic Treatment: Rhodora 43(511):352-353 (1941)
Species Account: Arabis aculeolata profile for potential Species of Conservation Concern evaluation (2018)
Other: Contributions from the Gray Herbarium 204:151 (1973)