Taxon Report

Arabis aculeolata Greene

Waldo rockcress

Print Report


© 2020 John Doyen

  Classification
Scientific Name:
 Arabis aculeolata Greene
Common Name:
 Waldo rockcress
Family: Brassicaceae
Element Code: PDBRA06010
USDA Plants Symbol: ARAC4
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial herb
Blooming Period: Apr-Jun Apr-Jun
Elevation: 410-1800 (1345-5905)
General Habitats: Broadleafed upland forest, Lower montane coniferous forest, Upper montane coniferous forest
Microhabitat: Serpentine
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 2B.2
Global Rank: G4
State Rank:
 S2
State List: None
Fed List: None
Other Status: SB_BerrySB
CRPR Changes:
  • changed from 2.2 to 2B.2 on 2012-04-11

Occurrence Data from the CNDDB
Total Occurrences: 8
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 0
   Fair (C) 0
   Poor (D) 0
   None (X) 0
   Unknown (U) 8

Location
California Endemic:  False
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)

Threat List Data from the CNDDB

Threat List Total: 2
EOs with Threat Listed: Total EOs % of EOs
2 25 %
Logging 2 25%
Erosion/runoff 1 12%

Notes
On watch list in OR. 
Threats:
Threatened by logging and mining.
Taxonomy:
Not in TJM 2.

Selected References

Proposed retention as CRPR 2.2 (2012)
Leaflets of Botanical Observation and Criticism 2:69-88 (1910)
Rhodora 43(511):352-353 (1941)
Arabis aculeolata profile for potential Species of Conservation Concern evaluation (2018)
Contributions from the Gray Herbarium 204:151 (1973)
Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 28 December 2024].