Species Details

Horkelia marinensis

Point Reyes horkelia

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Photo of Horkelia marinensis
© 2017 John Doyen
Photo of Horkelia marinensis
© 2021 John Doyen
Photo of Horkelia marinensis
© 2017 John Doyen
Scientific Name:
Horkelia marinensis (Elmer) Crum
Common Name:
Point Reyes horkelia
Family: Rosaceae
Element Code: PDROS0W0B0
USDA Plants Symbol: HOMA3
Synonyms/Other Names:
Lifeform: perennial herb
Blooming Period: May-Sep
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Elevation:
5 - 755 meters
15 - 2475 feet
General Habitats:
  • Coastal dunes
  • Coastal prairie
  • Coastal scrub
Microhabitat Details:
Microhabitat:
  • Sandy
Notes:
Populations from near Ft. Bragg, MEN Co. may be varietally distinct. Historical occurrences need field surveys. See Systematic Botany 18(1):137-144 (1993) for distributional information.
Threats:
Threatened by non-native plants and residential development. Possibly threatened by road maintenance and foot traffic.
Taxonomy:
Threat List Total: 10
Total EOs % of EOs
EOs with Threat Listed: 17 47 %
THREAT LIST:
Non-native plant impacts 8 22%
Other 7 19%
Grazing 6 16%
Development 4 11%
Altered flood/tidal/hydrologic regime 3 8%
Total Occurrences: 36
Element Occurrence Ranks:
A B C D X U
2 9 3 3 0 19
Occurrence Status:
Historical >20 Years 24
Recent <=20 Years 12
Presence:
Presumed Extant 36
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Marin (MRN), Mendocino (MEN), Monterey (MNT), San Mateo (SMT), Santa Cruz (SCR), Sonoma (SON)
Quads: Name (Quad Code)
Ano Nuevo (3712213), Bodega Head (3812331), Davenport (3712212)?, Drakes Bay (3812218), Felton (3712211), Fort Bragg (3912347), Gualala (3812375), Hales Grove (3912377), Inglenook (3912357), Inverness (3812217), Marina (3612167), Montara Mountain (3712254), Noyo Hill (3912346), Point Bonita (3712275), San Francisco South (3712264), Santa Cruz (3612281), Tomales (3812228), Valley Ford (3812238), Westport (3912367)
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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