Taxon Report
Hesperolinon tehamense H.K. Sharsm.Tehama County western flax |
 © 2018 John Doyen |
Taxon Summary
Hesperolinon tehamense, commonly known as Tehama County western flax, is a annual herb in the Linaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 100 to 1250 meters. Hesperolinon tehamense 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: |
Hesperolinon tehamense H.K. Sharsm. |
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Common Name: |
Tehama County western flax |
| Family: | Linaceae |
| Element Code: | PDLIN010C0 |
| USDA Plants Symbol: | HETE8 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: May-Jul | May-Jul |
| Elevation: | 100-1250 (330-4100) |
| General Habitats: | Chaparral, Cismontane woodland |
| Microhabitat: | Serpentine |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.3 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 16 |
| Element Occurrence Ranks: | |
| Excellent (A) | 8 |
| Good (B) | 1 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 7 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Glenn (GLE), Tehama (TEH) | |
| Quads: Name (Quad Code) | |
| Chrome (3912265), Elk Creek (3912255), Felkner Hill (3912256), Hall Ridge (3912276), Newville (3912275), Paskenta (3912285), Raglin Ridge (4012216), Riley Ridge (3912286) | |
Threat List Data from the CNDDB
| Threat List Total: | 3 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 8 | 50 % | |
| Other | 5 | 31% |
| Road/trail construction/maint. | 5 | 31% |
| Non-native plant impacts | 2 | 12% |
Notes
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Threats: |
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Threatened by vehicles and road maintenance. |
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Taxonomy: |
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Some plants from ALA, LAK, NAP, and STA cos. were previously treated as H. serpentinum ined.; plants from the inner north coast ranges of LAK and NAP cos. are now treated as H. sharsmithiae. Plants from ALA Co. are possibly H. clevelandii; needs further study. Similar to H. sharsmithiae. |
Selected References
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University of California Publications in Botany 32:298 (1961) |
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Hesperolinon tehamense profile for potential Species of Conservation Concern evaluation (2018) |
| 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 13 March 2025].