Taxon Report
Lilium occidentale Purdywestern lily |
 © 2018 Jason Matthias Mills |
Taxon Summary
Lilium occidentale, commonly known as western lily, is a perennial bulbiferous herb in the Liliaceae that is found in California and elsewhere. It occurs within Bogs and fens, Coastal bluff scrub, Coastal prairie, Coastal scrub, Marshes and swamps (freshwater), and North Coast coniferous forest (openings), growing at elevations from 2 to 185 meters. Lilium occidentale is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Lilium occidentale Purdy |
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Common Name: |
western lily |
| Family: | Liliaceae |
| Element Code: | PMLIL1A0G0 |
| USDA Plants Symbol: | LIOC2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial bulbiferous herb |
| Blooming Period: Jun-Jul | Jun-Jul |
| Elevation: | 2-185 (5-605) |
| General Habitats: | Bogs and fens, Coastal bluff scrub, Coastal prairie, Coastal scrub, Marshes and swamps, North Coast coniferous forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1G2 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FE |
| Other Status: | SB_BerrySB |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 16 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 4 |
| Fair (C) | 5 |
| Poor (D) | 3 |
| None (X) | 3 |
| Unknown (U) | 1 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Del Norte (DNT), Humboldt (HUM) | |
| Quads: Name (Quad Code) | |
| Arcata North (4012481), Arcata South (4012471), Cannibal Island (4012463), Crescent City (4112472), Eureka (4012472), Fields Landing (4012462), Sister Rocks (4112462) | |
Threat List Data from the CNDDB
| Threat List Total: | 7 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 13 | 81 % | |
| Development | 7 | 43% |
| Grazing | 7 | 43% |
| Other | 7 | 43% |
| Over-collecting/poaching | 4 | 25% |
| Foot traffic/trampling | 4 | 25% |
| ORV activity | 2 | 12% |
| Road/trail construction/maint. | 1 | 6% |
Notes
| Most CA occurrences under DFG management or voluntarily protected by landowners. Threatened by development, herbivory, inappropriate grazing, vegetation succession, and horticultural collecting. State-listed as Endangered in OR. See Erythea 5:103-105 (1897) 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 13 November 2025].