Taxon Report
Horkelia bolanderi GrayBolander's horkelia |
 © 2012 Barry Rice |
Classification
|
Scientific Name: |
Horkelia bolanderi Gray |
|
Common Name: |
Bolander's horkelia |
| Family: | Rosaceae |
| Element Code: | PDROS0W011 |
| USDA Plants Symbol: | HOBO2 |
|
Synonyms/Other Names: |
|
Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: (May)Jun-Aug | (May)Jun-Aug |
| Elevation: | 450-1100 (1475-3610) |
| General Habitats: | Chaparral, Lower montane coniferous forest, Meadows and seeps, Valley and foothill grassland |
| Microhabitat: | Edges, Vernally Mesic |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G1 |
|
State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S |
|
CRPR Changes: |
|
Occurrence Data from the CNDDB
| Total Occurrences: | 13 |
| Element Occurrence Ranks: | |
| Excellent (A) | 3 |
| Good (B) | 6 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 1 |
| Unknown (U) | 3 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Colusa (COL), Lake (LAK), Mendocino (MEN) | |
| Quads: Name (Quad Code) | |
| Benmore Canyon (3912215), Clearlake Highlands (3812286), Highland Springs (3812288), Hough Springs (3912225), Kelseyville (3812287), Leesville (3912224), Manor Slough (3912223), Potato Hill (3912237), Purdys Gardens (3912311), Salt Canyon (3912213), Whispering Pines (3812276), Wilbur Springs (3912214) | |
Threat List Data from the CNDDB
| Threat List Total: | 11 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 10 | 77 % | |
| Non-native plant impacts | 4 | 30% |
| Road/trail construction/maint. | 4 | 30% |
| Agriculture | 2 | 15% |
| Altered flood/tidal/hydrologic regime | 2 | 15% |
| Dam/Inundation | 1 | 7% |
| Development | 1 | 7% |
| Erosion/runoff | 1 | 7% |
| Foot traffic/trampling | 1 | 7% |
| Improper burning regime | 1 | 7% |
| Surface water diversion | 1 | 7% |
| ORV activity | 1 | 7% |
Selected References
|
Systematic Botany 18(1):137-144 (1993) |
|
Horkelia bolanderi profile for potential Species of Conservation Concern evaluation (2018) |
| USFS Potential Species of Conservation Concern Profile |
Citation
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 December 2024].