Taxon Report
Sedella leiocarpa H.K. Sharsm.Lake County stonecrop |
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Taxon Summary
Sedella leiocarpa, commonly known as Lake County stonecrop, is a annual herb in the Crassulaceae that is found only in California. It occurs within Cismontane woodland, Valley and foothill grassland, and Vernal pools, growing at elevations from 365 to 790 meters. Sedella leiocarpa is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Sedella leiocarpa H.K. Sharsm. |
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Common Name: |
Lake County stonecrop |
| Family: | Crassulaceae |
| Element Code: | PDCRA0F020 |
| USDA Plants Symbol: | SELE7 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Apr-May | Apr-May |
| Elevation: | 365-790 (1200-2590) |
| General Habitats: | Cismontane woodland, Valley and foothill grassland, Vernal pools |
| Microhabitat: | Vernally Mesic, Volcanic |
| Microhabitat Details: | vernally mesic depressions in volcanic outcrops |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FE |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 5 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 3 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 1 |
| Unknown (U) | 1 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Lake (LAK) | |
| Quads: Name (Quad Code) | |
| Clearlake Highlands (3812286), Middletown (3812275), Whispering Pines (3812276) | |
Threat List Data from the CNDDB
| Threat List Total: | 6 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 5 | 100 % | |
| Grazing | 3 | 60% |
| Non-native plant impacts | 1 | 20% |
| Other | 1 | 20% |
| Road/trail construction/maint. | 1 | 20% |
| Agriculture | 1 | 20% |
| Disking | 1 | 20% |
Notes
| Extremely vulnerable to trampling; also threatened by grazing, altered hydrology, and development. Potentially threatened by road widening, and possibly threatened by non-native plants. State and federally listed as Parvisedum leiocarpum; see this name in The Jepson Manual (1993). See Madroño 5(6):192 (1940) for original description, and Haseltonia 5:53-60 (1997) for taxonomic information. |
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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 5 February 2025].