Taxon Report
Eriogonum giganteum Wats. var. compactum DunkleSanta Barbara Island buckwheat |
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Taxon Summary
Eriogonum giganteum var. compactum, commonly known as Santa Barbara 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 300 meters. Eriogonum giganteum var. compactum is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.Classification
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Scientific Name: |
Eriogonum giganteum Wats. var. compactum Dunkle |
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Common Name: |
Santa Barbara Island buckwheat |
| Family: | Polygonaceae |
| Element Code: | PDPGN082A1 |
| USDA Plants Symbol: | ERGIC |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial deciduous shrub |
| Blooming Period: May-Aug(Sep) | May-Aug(Sep) |
| Elevation: | 10-300 (35-985) |
| General Habitats: | Coastal bluff scrub |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.3 |
| Global Rank: | G3T2 |
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State Rank: |
S2 |
| State List: | CR |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG; SB_USDA |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 4 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 3 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 1 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Santa Barbara (SBA) | |
| Quads: Name (Quad Code) | |
| Santa Barbara Island (3311848) | |
Threat List Data from the CNDDB
| Threat List Total: | 3 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 3 | 75 % | |
| Erosion/runoff | 2 | 50% |
| Foot traffic/trampling | 1 | 25% |
| Other | 1 | 25% |
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 December 2025].