Taxon Report
Chorizanthe pungens Benth. var. hartwegiana Rev. & HardhamBen Lomond spineflower |
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Species Description:
Chorizanthe pungens var. hartwegiana, commonly known as Ben Lomond spineflower, is a annual herb in the Polygonaceae that is found only in California. It occurs within Lower montane coniferous forest, growing at elevations from 90 to 610 meters. Chorizanthe pungens var. hartwegiana is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.
Classification
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Scientific Name: |
Chorizanthe pungens Benth. var. hartwegiana Rev. & Hardham |
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Common Name: |
Ben Lomond spineflower |
| Family: | Polygonaceae |
| Element Code: | PDPGN040M1 |
| USDA Plants Symbol: | CHPUH2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Apr-Jul | Apr-Jul |
| Elevation: | 90-610 (295-2000) |
| General Habitats: | Lower montane coniferous forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G2T1 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | FE |
| Other Status: | SB_UCSC |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 18 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 6 |
| Fair (C) | 4 |
| Poor (D) | 0 |
| None (X) | 1 |
| Unknown (U) | 6 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Santa Cruz (SCR) | |
| Quads: Name (Quad Code) | |
| Big Basin (3712222), Castle Rock Ridge (3712221), Davenport (3712212), Felton (3712211), Laurel (3712118) | |
Threat List Data from the CNDDB
| Threat List Total: | 9 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 10 | 56 % | |
| Development | 7 | 38% |
| Mining | 3 | 16% |
| Recreational use (non-ORV) | 3 | 16% |
| Road/trail construction/maint. | 2 | 11% |
| Foot traffic/trampling | 2 | 11% |
| Grazing | 1 | 5% |
| Logging | 1 | 5% |
| Erosion/runoff | 1 | 5% |
| Non-native plant impacts | 1 | 5% |
Notes
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Known only from sandhill parklands in the Santa Cruz Mtns. Threatened by sand mining, development, and non-native plants. See C. pungens |
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Threats: |
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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 15 January 2025].