Taxon Report
Eriogonum giganteum Wats. var. formosum K. Bdg.San Clemente Island buckwheat |
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Taxon Summary
Eriogonum giganteum var. formosum, commonly known as San Clemente Island buckwheat, is a perennial deciduous shrub in the Polygonaceae that is found only in California. It occurs within Coastal bluff scrub, growing at elevations from 10 to 455 meters. Eriogonum giganteum var. formosum 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 giganteum Wats. var. formosum K. Bdg. |
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Common Name: |
San Clemente Island buckwheat |
| Family: | Polygonaceae |
| Element Code: | PDPGN082A2 |
| USDA Plants Symbol: | ERGIF |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial deciduous shrub |
| Blooming Period: Mar-Oct | Mar-Oct |
| Elevation: | 10-455 (35-1495) |
| General Habitats: | Coastal bluff scrub |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G3T3? |
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State Rank: |
S3? |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 39 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 39 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Los Angeles (LAX) | |
| Quads: Name (Quad Code) | |
| San Clemente Island Central (3211874), San Clemente Island North (3211885), San Clemente Island South (3211873) | |
Threat List Data from the CNDDB
| Threat List Total: | 1 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 1 | 3 % | |
| Development | 1 | 2% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 14 December 2025].