Taxon Report
Lomatium congdonii Coult. & RoseCongdon's lomatium |
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Taxon Summary
Lomatium congdonii, commonly known as Congdon's lomatium, is a perennial herb in the Apiaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 300 to 2100 meters. Lomatium congdonii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Lomatium congdonii Coult. & Rose |
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Common Name: |
Congdon's lomatium |
| Family: | Apiaceae |
| Element Code: | PDAPI1B0B0 |
| USDA Plants Symbol: | LOCO3 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Mar-Jun | Mar-Jun |
| Elevation: | 300-2100 (985-6890) |
| General Habitats: | Chaparral, Cismontane woodland |
| Microhabitat: | Serpentine |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_SBBG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 20 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 3 |
| Fair (C) | 2 |
| Poor (D) | 0 |
| None (X) | 1 |
| Unknown (U) | 14 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Calaveras (CAL), Mariposa (MPA)*, Tuolumne (TUO) | |
| Quads: Name (Quad Code) | |
| Cherry Lake South (3711988), Chinese Camp (3712074), Keystone (3712075), Mariposa (3711948)*, Moccasin (3712073), New Melones Dam (3712085), Salt Spring Valley (3812016), Sonora (3712084) | |
Threat List Data from the CNDDB
| Threat List Total: | 9 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 4 | 20 % | |
| Mining | 2 | 10% |
| ORV activity | 2 | 10% |
| Recreational use (non-ORV) | 2 | 10% |
| Vandalism/dumping/litter | 2 | 10% |
| Wood cutting or brush clearing | 1 | 5% |
| Biocides | 1 | 5% |
| Erosion/runoff | 1 | 5% |
| Grazing | 1 | 5% |
| Road/trail construction/maint. | 1 | 5% |
Notes
| Known from fewer than twenty occurrences. Collections at UC from Red Mtn. (600B), MEN Co. may be this taxon. Threatened by vehicles and mining. Protected at Red Hills ACEC (BLM), TUO Co. See Contributions from the U.S. National Herbarium 7:232 (1900) for original description. |
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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].