Taxon Report
Hesperolinon adenophyllum (Gray) Smallglandular western flax |
 © 2002 John Game |
Taxon Summary
Hesperolinon adenophyllum, commonly known as glandular western flax, is a annual herb in the Linaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Valley and foothill grassland, growing at elevations from 150 to 1315 meters. Hesperolinon adenophyllum is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
|
Scientific Name: |
Hesperolinon adenophyllum (Gray) Small |
|
Common Name: |
glandular western flax |
| Family: | Linaceae |
| Element Code: | PDLIN01010 |
| USDA Plants Symbol: | HEAD |
|
Synonyms/Other Names: |
|
Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: May-Aug | May-Aug |
| Elevation: | 150-1315 (490-4315) |
| General Habitats: | Chaparral, Cismontane woodland, Valley and foothill grassland |
| Microhabitat: | Serpentine (usually) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2G3 |
|
State Rank: |
S2S3 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S |
|
CRPR Changes: |
|
Occurrence Data from the CNDDB
| Total Occurrences: | 48 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 10 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 35 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Lake (LAK), Mendocino (MEN) | |
| Quads: Name (Quad Code) | |
| Bartlett Mtn. (3912227), Burbeck (3912344), Cow Mountain (3912321), Crockett Peak (3912247), Elk Mountain (3912238), Foster Mtn. (3912342), Greenough Ridge (3912334), Highland Springs (3812288), Kelseyville (3812287), Lake Pillsbury (3912248), Lakeport (3912218), Laughlin Range (3912333), Laytonville (3912364), Longvale (3912354), Lucerne (3912217), Potato Hill (3912237), Potter Valley (3912331), Sanhedrin Mtn. (3912351), The Geysers (3812277), Upper Lake (3912228), Van Arsdale Reservoir (3912341), Whispering Pines (3812276), Willits (3912343) | |
Threat List Data from the CNDDB
| Threat List Total: | 9 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 14 | 29 % | |
| Road/trail construction/maint. | 7 | 14% |
| Other | 4 | 8% |
| Development | 4 | 8% |
| Biocides | 3 | 6% |
| Erosion/runoff | 2 | 4% |
| Grazing | 2 | 4% |
| Logging | 2 | 4% |
| ORV activity | 1 | 2% |
| Vandalism/dumping/litter | 1 | 2% |
Selected References
|
Proceedings of the American Academy of Arts and Sciences 8:624-625 (1873) |
|
University of California Publications in Botany 32:235-314 (1961) |
|
Hesperolinon adenophyllum 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 6 March 2025].