Taxon Report
Dudleya abramsii Rose ssp. murina (Eastw.) Moranmouse-gray dudleya |
 Chris Winchell |
Species Description:
Dudleya abramsii ssp. murina, commonly known as mouse-gray dudleya, is a perennial leaf in the Crassulaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Valley and foothill grassland, growing at elevations from 90 to 525 meters. Dudleya abramsii ssp. murina is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.
Classification
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Scientific Name: |
Dudleya abramsii Rose ssp. murina (Eastw.) Moran |
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Common Name: |
mouse-gray dudleya |
| Family: | Crassulaceae |
| Element Code: | PDCRA04012 |
| USDA Plants Symbol: | DUABM |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial leaf |
| Blooming Period: May-Jun | May-Jun |
| Elevation: | 90-525 (295-1725) |
| General Habitats: | Chaparral, Cismontane woodland, Valley and foothill grassland |
| Microhabitat: | Serpentine |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G4T2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 36 |
| Element Occurrence Ranks: | |
| Excellent (A) | 4 |
| Good (B) | 13 |
| Fair (C) | 4 |
| Poor (D) | 2 |
| None (X) | 0 |
| Unknown (U) | 13 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| San Luis Obispo (SLO) | |
| Quads: Name (Quad Code) | |
| Arroyo Grande NE (3512025), Atascadero (3512046), Cayucos (3512048), Lopez Mtn. (3512035), Morro Bay North (3512047), Morro Bay South (3512037), Pismo Beach (3512026), Port San Luis (3512027), San Luis Obispo (3512036), Santa Margarita Lake (3512034) | |
Threat List Data from the CNDDB
| Threat List Total: | 12 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 20 | 56 % | |
| Grazing | 12 | 33% |
| Development | 7 | 19% |
| Non-native plant impacts | 4 | 11% |
| Road/trail construction/maint. | 4 | 11% |
| Other | 3 | 8% |
| Feral pigs | 3 | 8% |
| Improper burning regime | 3 | 8% |
| Military operations | 3 | 8% |
| Over-collecting/poaching | 2 | 5% |
| Mining | 1 | 2% |
| Foot traffic/trampling | 1 | 2% |
| Erosion/runoff | 1 | 2% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 20 January 2025].