Taxon Report
Horkelia marinensis (Elmer) CrumPoint Reyes horkelia |
 © 2017 John Doyen |
Classification
|
Scientific Name: |
Horkelia marinensis (Elmer) Crum |
|
Common Name: |
Point Reyes horkelia |
| Family: | Rosaceae |
| Element Code: | PDROS0W0B0 |
| USDA Plants Symbol: | HOMA3 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: May-Sep | May-Sep |
| Elevation: | 5-755 (15-2475) |
| General Habitats: | Coastal dunes, Coastal prairie, Coastal scrub |
| Microhabitat: | Sandy |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2 |
|
State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG; SB_UCSC |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 36 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 9 |
| Fair (C) | 3 |
| Poor (D) | 3 |
| None (X) | 0 |
| Unknown (U) | 19 |
| California Endemic: True | |
| 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) | |
Threat List Data from the CNDDB
| Threat List Total: | 10 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 17 | 47 % | |
| Non-native plant impacts | 8 | 22% |
| Other | 7 | 19% |
| Grazing | 6 | 16% |
| Development | 4 | 11% |
| Altered flood/tidal/hydrologic regime | 3 | 8% |
| Foot traffic/trampling | 3 | 8% |
| Road/trail construction/maint. | 3 | 8% |
| Vandalism/dumping/litter | 2 | 5% |
| Recreational use (non-ORV) | 2 | 5% |
| Erosion/runoff | 2 | 5% |
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. |
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Taxonomy: |
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].