Taxon Report
Iva hayesiana GraySan Diego marsh-elder |
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Species Description:
Iva hayesiana, commonly known as San Diego marsh-elder, is a perennial herb in the Asteraceae that is found in California and elsewhere. It occurs within Marshes and swamps, and Playas, growing at elevations from 0 to 500 meters. Iva hayesiana is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.
Classification
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Scientific Name: |
Iva hayesiana Gray |
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Common Name: |
San Diego marsh-elder |
| Family: | Asteraceae |
| Element Code: | PDAST580A0 |
| USDA Plants Symbol: | IVHA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Apr-Oct | Apr-Oct |
| Elevation: | 0-500 (0-1640) |
| General Habitats: | Marshes and swamps, Playas |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.2 |
| Global Rank: | G3 |
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State Rank: |
S2 |
| 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: | 128 |
| Element Occurrence Ranks: | |
| Excellent (A) | 4 |
| Good (B) | 14 |
| Fair (C) | 6 |
| Poor (D) | 3 |
| None (X) | 1 |
| Unknown (U) | 100 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Del Mar (3211782), Dulzura (3211667), El Cajon Mtn. (3211687), Encinitas (3311713), Escondido (3311711), Imperial Beach (3211751), Jamul Mountains (3211668), La Jolla (3211772), La Mesa (3211771), National City (3211761), Oceanside (3311724), Otay Mesa (3211658), Otay Mountain (3211657), Point Loma (3211762), Poway (3211781), Rancho Santa Fe (3311712), San Luis Rey (3311723) | |
Threat List Data from the CNDDB
| Threat List Total: | 13 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 62 | 48 % | |
| Development | 42 | 32% |
| Non-native plant impacts | 14 | 10% |
| Other | 13 | 10% |
| ORV activity | 5 | 3% |
| Road/trail construction/maint. | 4 | 3% |
| Erosion/runoff | 3 | 2% |
| Foot traffic/trampling | 3 | 2% |
| Recreational use (non-ORV) | 2 | 1% |
| Wood cutting or brush clearing | 1 | 0% |
| Grazing | 1 | 0% |
| Mining | 1 | 0% |
| Agriculture | 1 | 0% |
| Channelization | 1 | 0% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 24 January 2025].