Taxon Report
Pedicularis dudleyi ElmerDudley's lousewort |
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Taxon Summary
Pedicularis dudleyi, commonly known as Dudley's lousewort, is a perennial herb in the Orobanchaceae that is found only in California. It occurs within Chaparral (maritime), Cismontane woodland, North Coast coniferous forest, and Valley and foothill grassland, growing at elevations from 60 to 900 meters. Pedicularis dudleyi is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Pedicularis dudleyi Elmer |
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Common Name: |
Dudley's lousewort |
| Family: | Orobanchaceae |
| Element Code: | PDSCR1K180 |
| USDA Plants Symbol: | PEDU |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Apr-Jun | Apr-Jun |
| Elevation: | 60-900 (195-2955) |
| General Habitats: | Chaparral, Cismontane woodland, North Coast coniferous forest, Valley and foothill grassland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | CR |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG; SB_UCSC; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 7 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 3 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 3 |
| Unknown (U) | 1 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Monterey (MNT), San Mateo (SMT), Santa Cruz (SCR) | |
| Quads: Name (Quad Code) | |
| Big Basin (3712222), Big Sur (3612137), Castle Rock Ridge (3712221), Davenport (3712212), Felton (3712211), Mindego Hill (3712232), Soquel (3612188), Watsonville West (3612187) | |
Threat List Data from the CNDDB
| Threat List Total: | 12 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 6 | 86 % | |
| Road/trail construction/maint. | 4 | 57% |
| Erosion/runoff | 3 | 42% |
| Foot traffic/trampling | 3 | 42% |
| Improper burning regime | 3 | 42% |
| Other | 3 | 42% |
| Recreational use (non-ORV) | 3 | 42% |
| Wood cutting or brush clearing | 2 | 28% |
| Development | 1 | 14% |
| Disease | 1 | 14% |
| Insufficient population/stand size | 1 | 14% |
| Logging | 1 | 14% |
| ORV activity | 1 | 14% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 10 November 2025].