Taxon Report
Boechera hoffmannii (Munz) Al-ShehbazHoffmann's rockcress |
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Taxon Summary
Boechera hoffmannii, commonly known as Hoffmann's rockcress, is a perennial herb in the Brassicaceae that is found only in California. It occurs within Chaparral, Coastal bluff scrub, and Coastal scrub, growing at elevations from 60 to 395 meters. Boechera hoffmannii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Boechera hoffmannii (Munz) Al-Shehbaz |
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Common Name: |
Hoffmann's rockcress |
| Family: | Brassicaceae |
| Element Code: | PDBRA060V0 |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Feb-Apr | Feb-Apr |
| Elevation: | 60-395 (195-1295) |
| General Habitats: | Chaparral, Coastal bluff scrub, Coastal scrub |
| Microhabitat: | Rocky, Sandy, Volcanic |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1G2 |
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State Rank: |
S1S2 |
| State List: | None |
| Fed List: | FE |
| Other Status: | SB_CalBG/RSABG; SB_SBBG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 7 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 2 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 4 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Santa Barbara (SBA), Ventura (VEN) | |
| Quads: Name (Quad Code) | |
| Anacapa Island (3311983)*, Santa Cruz Island B (3311986), Santa Cruz Island C (3311985), Santa Rosa Island East (3311988), Santa Rosa Island North (3312081) | |
Threat List Data from the CNDDB
| Threat List Total: | 3 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 3 | 43 % | |
| Erosion/runoff | 3 | 42% |
| Grazing | 1 | 14% |
| Non-native plant impacts | 1 | 14% |
Notes
| Rediscovered independently in 1985 by T. Hesseldenz and S. Junak on SCZ Isl. Feral herbivore populations reduced, but still threatened by feral pigs; also possibly threatened by erosion and non-native plants. Reintroduction work on SCZ Isl. ongoing as of 1996. Recent surveys on ANA Isl. have been unsuccessful. See Rhodora 43(511):407 (1941) for taxonomic treatment, and Novon 13(4):381-391 (2003) for revised nomenclature.. |
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Threats: |
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Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 12 November 2025].