Taxon Report
Eriogonum twisselmannii (J.T. Howell) Rev.Twisselmann's buckwheat |
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Taxon Summary
Eriogonum twisselmannii, commonly known as Twisselmann's buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Upper montane coniferous forest, growing at elevations from 2375 to 2805 meters. Eriogonum twisselmannii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Eriogonum twisselmannii (J.T. Howell) Rev. |
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Common Name: |
Twisselmann's buckwheat |
| Family: | Polygonaceae |
| Element Code: | PDPGN08610 |
| USDA Plants Symbol: | ERTW2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Jun-Sep | Jun-Sep |
| Elevation: | 2375-2805 (7790-9205) |
| General Habitats: | Upper montane coniferous forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | CR |
| Fed List: | None |
| Other Status: | USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 13 |
| Element Occurrence Ranks: | |
| Excellent (A) | 9 |
| Good (B) | 3 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 1 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Tulare (TUL) | |
| Quads: Name (Quad Code) | |
| Camp Nelson (3611825), Sentinel Peak (3611815) | |
Threat List Data from the CNDDB
| Threat List Total: | 3 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 4 | 31 % | |
| Logging | 2 | 15% |
| Other | 1 | 7% |
| Foot traffic/trampling | 1 | 7% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 November 2025].