Taxon Report
Erythronium howellii Wats.Howell's fawn lily |
 © 2021 Scot Loring |
Taxon Summary
Erythronium howellii, commonly known as Howell's fawn lily, is a perennial bulbiferous herb in the Liliaceae that is found in California and elsewhere. It occurs within Lower montane coniferous forest, and North Coast coniferous forest, growing at elevations from 200 to 1145 meters. Erythronium howellii is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.Classification
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Scientific Name: |
Erythronium howellii Wats. |
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Common Name: |
Howell's fawn lily |
| Family: | Liliaceae |
| Element Code: | PMLIL0U080 |
| USDA Plants Symbol: | ERHO10 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial bulbiferous herb |
| Blooming Period: Apr-May | Apr-May |
| Elevation: | 200-1145 (655-3755) |
| General Habitats: | Lower montane coniferous forest, North Coast coniferous forest |
| Microhabitat: | Serpentine (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.3 |
| Global Rank: | G3G4 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 11 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 10 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Del Norte (DNT), Siskiyou (SIS) | |
| Quads: Name (Quad Code) | |
| Takilma (4212315), Broken Rib Mtn. (4112386), Gasquet (4112378), High Divide (4112481), High Plateau Mtn. (4112388), Hiouchi (4112471), Hurdygurdy Butte (4112377), Polar Bear Mtn. (4112385), Shelly Creek Ridge (4112387) | |
Threat List Data from the CNDDB
| Threat List Total: | 3 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 2 | 18 % | |
| Logging | 1 | 9% |
| Mining | 1 | 9% |
| Road/trail construction/maint. | 1 | 9% |
Notes
| Possibly threatened by logging and associated road use. Endangered in OR. A synonym of E. citrinum in TJM (1993) and TJM 2. See Proceedings of the American Academy of Arts and Sciences 22:480 (1887) for original description, and Madroño 3(2):89 (1935) for taxonomic treatment. |
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Threats: |
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Taxonomy: |
Selected References
| CRPR List Deletion on 2013-02-01 |
| USFS Potential Species of Conservation Concern Profile |
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].