Species Details

Horkelia bolanderi

Bolander's horkelia

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Photo of Horkelia bolanderi
© 2012 Barry Rice
Photo of Horkelia bolanderi
© 2019 Steve Matson
Photo of Horkelia bolanderi
© 2019 Steve Matson
Lifeform: perennial herb
Blooming Period: (May)Jun-Aug
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Elevation:
450 - 1100 meters
1475 - 3610 feet
General Habitats:
  • Chaparral
  • Lower montane coniferous forest
  • Meadows and seeps
  • Valley and foothill grassland
Microhabitat Details:
Microhabitat:
  • Edges
  • Vernally Mesic
Notes:
Threats:
Threatened by vehicles. Possibly threatened by development, road widening, hydrological alterations, and non-native plants.
Taxonomy:
Threat List Total: 11
Total EOs % of EOs
EOs with Threat Listed: 10 77 %
THREAT LIST:
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%
Total Occurrences: 13
Element Occurrence Ranks:
A B C D X U
3 6 0 0 1 3
Occurrence Status:
Historical >20 Years 6
Recent <=20 Years 7
Presence:
Presumed Extant 12
Possibly Extirpated 1
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
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)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant
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