Taxon Report
Calochortus tiburonensis HillTiburon mariposa-lily |
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Classification
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Scientific Name: |
Calochortus tiburonensis Hill |
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Common Name: |
Tiburon mariposa-lily |
| Family: | Liliaceae |
| Element Code: | PMLIL0D1C0 |
| USDA Plants Symbol: | CATI3 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial bulbiferous herb |
| Blooming Period: Mar-Jun | Mar-Jun |
| Elevation: | 50-150 (165-490) |
| General Habitats: | Valley and foothill grassland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CT |
| Fed List: | FT |
| Other Status: | SB_UCBG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 1 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Marin (MRN) | |
| Quads: Name (Quad Code) | |
| San Quentin (3712284) | |
Threat List Data from the CNDDB
| Threat List Total: | 2 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 1 | 100 % | |
| Foot traffic/trampling | 1 | 100% |
| Non-native plant impacts | 1 | 100% |
Notes
| Known from only one occurrence at Ring Mtn. Preserve on the Tiburon Peninsula. Threatened by recreational activities and non-native plants. Potentially threatened by deer browsing. See Madroño 22(2):100-104 (1973) for original description, and Journal of Ecology 75:977-995 (1987) for population biology. |
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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 9 January 2025].