Taxon Report
Horkelia cuneata Lindl. var. sericea (A. Gray) Ertter & RevealKellogg's horkelia |
 © 2018 Neal Kramer |
Taxon Summary
Horkelia cuneata var. sericea, commonly known as Kellogg's horkelia, is a perennial herb in the Rosaceae that is found only in California. It occurs within Chaparral (maritime), Closed-cone coniferous forest, Coastal dunes, and Coastal scrub, growing at elevations from 10 to 200 meters. Horkelia cuneata var. sericea is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Horkelia cuneata Lindl. var. sericea (A. Gray) Ertter & Reveal |
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Common Name: |
Kellogg's horkelia |
| Family: | Rosaceae |
| Element Code: | PDROS0W043 |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Apr-Sep | Apr-Sep |
| Elevation: | 10-200 (35-655) |
| General Habitats: | Chaparral, Closed-cone coniferous forest, Coastal dunes, Coastal scrub |
| Microhabitat: | Gravelly (sometimes), Openings, Sandy (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G4T1? |
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State Rank: |
S1? |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG; SB_UCSC; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 58 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 2 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 3 |
| Unknown (U) | 52 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Alameda (ALA)*, Marin (MRN)*, Monterey (MNT), San Francisco (SFO)*, San Luis Obispo (SLO), San Mateo (SMT), Santa Barbara (SBA), Santa Cruz (SCR) | |
| Quads: Name (Quad Code) | |
| Ano Nuevo (3712213), Arroyo Grande NE (3512025), Cambria (3512151), Casmalia (3412075)*, Davenport (3712212), Drakes Bay (3812218)*, Felton (3712211), Guadalupe (3412085)*, Half Moon Bay (3712244), Laurel (3712118), Lompoc Hills (3412054), Marina (3612167), Montara Mountain (3712254), Monterey (3612158)*, Morro Bay North (3512047), Morro Bay South (3512037)*, Oakland East (3712272)*, Oakland West (3712273)*, Oceano (3512015), Orcutt (3412074), Paso Robles (3512066), Pico Creek (3512152), Point Arguello (3412056), Point Bonita (3712275), Point Conception (3412044), Point Sal (3412086)*, Sacate (3412043), Salinas (3612166), San Francisco North (3712274)*, San Francisco South (3712264), San Leandro (3712262), San Miguel (3512076), Santa Cruz (3612281), Santa Margarita (3512045), Santa Rosa Hills (3412053), Seaside (3612157), Spreckels (3612156), Surf (3412065), Tomales (3812228), Tranquillon Mtn. (3412055), Watsonville West (3612187) | |
Threat List Data from the CNDDB
| Threat List Total: | 7 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 11 | 19 % | |
| Development | 7 | 12% |
| Non-native plant impacts | 5 | 8% |
| Road/trail construction/maint. | 3 | 5% |
| Other | 2 | 3% |
| ORV activity | 1 | 1% |
| Erosion/runoff | 1 | 1% |
| Insufficient population/stand size | 1 | 1% |
Notes
| Threatened by coastal development. Historical occurrences need field surveys. Occurrence from the Crocker Hills probably last remaining location in S.F. Bay; remaining plants less distinct from ssp. cuneata than those formerly occurring near San Francisco. See Novon 17(3):315-325 (2007) for revised nomenclature. |
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Threats: |
| Threatened by coastal development. |
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Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 30 January 2025].