Taxon Report
Boechera rubicundula (Jeps.) Windham & Al-ShehbazMt. Day rockcress |
|
Classification
|
Scientific Name: |
Boechera rubicundula (Jeps.) Windham & Al-Shehbaz |
|
Common Name: |
Mt. Day rockcress |
| Family: | Brassicaceae |
| Element Code: | PDBRA40100 |
| USDA Plants Symbol: | |
|
Synonyms/Other Names: |
|
Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Apr-May | Apr-May |
| Elevation: | 1200-1200 (3935-3935) |
| General Habitats: | Chaparral |
| Microhabitat: | Rocky, Slopes |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
|
State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
|
CRPR Changes: |
|
Occurrence Data from the CNDDB
| Total Occurrences: | 1 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 1 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Santa Clara (SCL) | |
| Quads: Name (Quad Code) | |
| Mt. Day (3712146) | |
Threat List Data from the CNDDB
| Threat List Total: | 0 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 0 | % | |
|
|
||
Notes
| One Known Occurrence (OKO); known only from the type collection on Mt. Day. |
|
Threats: |
|
Taxonomy: |
| Similar to B. arcuata and B. breweri ssp. breweri. Differs from B. arcuata in having spatulate to oblanceolate basal leaves, shorter fruiting pedicels with spreading trichomes, and shorter fruits; differs from B. breweri ssp. breweri in having taller stems with at least some 3-rayed trichomes, and slightly descending to horizontal fruiting pedicels with a predominance of 2-rayed trichomes. Windham and Al-Shehbaz (2007) “hypothesize that B. rubicundula is a reproductively competent, apomictic hybrid containing genomes from B. arcuata and B. breweri.” |
Selected References
| Proposed Addition to CRPR 1B.1, G1 / S1 (2011) |
| Flora of California 2:69 (1936) |
| Harvard Papers in Botany 11(2):257-274 (2007) |
Citation
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].