Taxon Report
Dudleya abramsii Rose ssp. affinis K. NakaiSan Bernardino Mountains dudleya |
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Classification
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Scientific Name: |
Dudleya abramsii Rose ssp. affinis K. Nakai |
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Common Name: |
San Bernardino Mountains dudleya |
| Family: | Crassulaceae |
| Element Code: | PDCRA04013 |
| USDA Plants Symbol: | DUABA2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Apr-Jul | Apr-Jul |
| Elevation: | 1250-2600 (4100-8530) |
| General Habitats: | Pebble (Pavement) plain, Pinyon and juniper woodland, Upper montane coniferous forest |
| Microhabitat: | Carbonate (sometimes), Granitic (sometimes) |
| Microhabitat Details: | sometimes quartzite |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G4T2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 54 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 7 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 46 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| San Bernardino (SBD) | |
| Quads: Name (Quad Code) | |
| Apple Valley South (3411742), Big Bear City (3411637), Butler Peak (3411731), Fawnskin (3411638), Lake Arrowhead (3411732), Moonridge (3411627), Onyx Peak (3411626), Rattlesnake Canyon (3411636) | |
Threat List Data from the CNDDB
| Threat List Total: | 11 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 18 | 33 % | |
| ORV activity | 8 | 14% |
| Mining | 7 | 12% |
| Foot traffic/trampling | 5 | 9% |
| Non-native plant impacts | 3 | 5% |
| Road/trail construction/maint. | 3 | 5% |
| Vandalism/dumping/litter | 2 | 3% |
| Grazing | 2 | 3% |
| Improper burning regime | 1 | 1% |
| Other | 1 | 1% |
| Recreational use (non-ORV) | 1 | 1% |
| Development | 1 | 1% |
Notes
| Known only from the San Bernardino Mtns. Threatened by development, foot traffic, limestone mining, and vehicles. Possibly threatened by non-native plants and illegal dumping. See Madroño 34(4):349 (1987) for original description. |
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Threats: |
| Threatened by development, foot traffic, limestone mining, and vehicles. Possibly threatened by non-native plants and illegal dumping. |
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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 6 January 2025].