Taxon Report
Horkelia hendersonii HowellHenderson's horkelia |
 © 2021 Scot Loring |
Taxon Summary
Horkelia hendersonii, commonly known as Henderson's horkelia, is a perennial herb in the Rosaceae that is found in California and elsewhere. It occurs within Upper montane coniferous forest, growing at elevations from 2000 to 2300 meters. Horkelia hendersonii 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 hendersonii Howell |
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Common Name: |
Henderson's horkelia |
| Family: | Rosaceae |
| Element Code: | PDROS0W090 |
| USDA Plants Symbol: | HOHE2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Jun-Aug | Jun-Aug |
| Elevation: | 2000-2300 (6560-7545) |
| General Habitats: | Upper montane coniferous forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1G2 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_BerrySB; SB_CalBG/RSABG; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 1 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 1 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Siskiyou (SIS) | |
| Quads: Name (Quad Code) | |
| Condrey Mtn. (4112288) | |
Threat List Data from the CNDDB
| Threat List Total: | 1 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 1 | 100 % | |
| Road/trail construction/maint. | 1 | 100% |
Selected References
| Horkelia hendersonii account for potential Species of Conservation Concern evaluation (2020) |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 19 November 2025].