Taxon Report
Hesperolinon drymarioides (Curran) Smalldrymaria-like western flax |
 © Niall McCarten and CNPS |
Taxon Summary
Hesperolinon drymarioides, commonly known as drymaria-like western flax, is a annual herb in the Linaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, Closed-cone coniferous forest, and Valley and foothill grassland, growing at elevations from 100 to 1130 meters. Hesperolinon drymarioides is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Hesperolinon drymarioides (Curran) Small |
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Common Name: |
drymaria-like western flax |
| Family: | Linaceae |
| Element Code: | PDLIN01090 |
| USDA Plants Symbol: | HEDR4 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: May-Aug | May-Aug |
| Elevation: | 100-1130 (330-3710) |
| General Habitats: | Chaparral, Cismontane woodland, Closed-cone coniferous forest, Valley and foothill grassland |
| Microhabitat: | Serpentine |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 24 |
| Element Occurrence Ranks: | |
| Excellent (A) | 6 |
| Good (B) | 8 |
| Fair (C) | 7 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 3 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Colusa (COL), Glenn (GLE), Lake (LAK), Napa (NAP) | |
| Quads: Name (Quad Code) | |
| Elk Mountain (3912238), Gilmore Peak (3912235), Hough Springs (3912225), Jericho Valley (3812274), Knoxville (3812273), Leesville (3912224), Potato Hill (3912237), St. John Mtn. (3912246), Stonyford (3912245), Wilbur Springs (3912214), Wilson Valley (3812284) | |
Threat List Data from the CNDDB
| Threat List Total: | 5 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 14 | 58 % | |
| Development | 6 | 25% |
| Road/trail construction/maint. | 5 | 20% |
| ORV activity | 4 | 16% |
| Mining | 2 | 8% |
| Wood cutting or brush clearing | 1 | 4% |
Selected References
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Bulletin of the California Academy of Sciences 1:152 (1885) |
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University of California Publications in Botany 32:235-314 (1961) |
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Hesperolinon drymarioides 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 27 January 2025].