Taxon Report
Navarretia leucocephala Benth. ssp. plieantha (Mason) A.G. Daymany-flowered navarretia |
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Taxon Summary
Navarretia leucocephala ssp. plieantha, commonly known as many-flowered navarretia, is a annual herb in the Polemoniaceae that is found only in California. It occurs within Vernal pools, growing at elevations from 30 to 950 meters. Navarretia leucocephala ssp. plieantha is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Navarretia leucocephala Benth. ssp. plieantha (Mason) A.G. Day |
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Common Name: |
many-flowered navarretia |
| Family: | Polemoniaceae |
| Element Code: | PDPLM0C0E5 |
| USDA Plants Symbol: | NALEP2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: May-Jun | May-Jun |
| Elevation: | 30-950 (100-3115) |
| General Habitats: | Vernal pools |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G4T1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FE |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 8 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 3 |
| Fair (C) | 2 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 1 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Lake (LAK), Sonoma (SON) | |
| Quads: Name (Quad Code) | |
| Clearlake Highlands (3812286), Healdsburg (3812257), Kelseyville (3812287), Mark West Springs (3812256), Middletown (3812275), Whispering Pines (3812276) | |
Threat List Data from the CNDDB
| Threat List Total: | 9 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 7 | 88 % | |
| Development | 3 | 37% |
| Grazing | 3 | 37% |
| Non-native plant impacts | 2 | 25% |
| Foot traffic/trampling | 2 | 25% |
| ORV activity | 1 | 12% |
| Road/trail construction/maint. | 1 | 12% |
| Erosion/runoff | 1 | 12% |
| Agriculture | 1 | 12% |
| Altered flood/tidal/hydrologic regime | 1 | 12% |
Notes
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Known from fewer than ten occurrences. Threatened by grazing, development, and vehicles. Protected in part at Loch Lomond Vernal Pool ER (DFG) and Bogg's Lake Preserve (TNC). State-listed as N. plieantha |
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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 29 October 2025].