Taxon Report
Arabis oregana Roll.Oregon rockcress |
 ©2021 Scot Loring |
Taxon Summary
Arabis oregana, commonly known as Oregon rockcress, is a perennial herb in the Brassicaceae that is found in California and elsewhere. It occurs within Chaparral, and Lower montane coniferous forest, growing at elevations from 600 to 1830 meters. Arabis oregana is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.Classification
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Scientific Name: |
Arabis oregana Roll. |
|
Common Name: |
Oregon rockcress |
| Family: | Brassicaceae |
| Element Code: | PDBRA061A0 |
| USDA Plants Symbol: | AROR |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: May | May |
| Elevation: | 600-1830 (1970-6005) |
| General Habitats: | Chaparral, Lower montane coniferous forest |
| Microhabitat: | Serpentine |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 4.3 |
| Global Rank: | G3G4Q |
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State Rank: |
S3 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 0 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Napa (NAP), Siskiyou (SIS), Trinity (TRI) | |
| Quads: Name (Quad Code) | |
| Clear Creek (4112364), Dees Peak (4112313), Dewey Gulch (4112273), Forks of Salmon (4112333), Hamburg (4112371), Hayfork Bally (4012362), Indian Creek Baldy (4112267), Jericho Valley (3812274), Kangaroo Mtn. (4112382), Knoxville (3812273), McKinley Mtn. (4112277), Orleans Mtn. (4112334), Scott Bar (4112361), Seiad Valley (4112372), Somes Bar (4112344), Youngs Peak (4112323) | |
Threat List Data from the CNDDB
| Threat List Total: | 0 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 0 | 0 % | |
Selected References
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Rhodora 43(511):349-350 (1941) |
| Arabis oregana profile for potential Species of Conservation Concern evaluation (2018) |
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Contributions from the Gray Herbarium 204:149-154 (1973) |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].