Kauaʻi record · kba_plant_eucalyptus_robusta
Swamp mahogany
Eucalyptus robusta
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About Swamp mahogany
Swamp mahogany (Eucalyptus robusta) is an eastern Australian tree introduced to Hawaiʻi for forestry. Historic Kauaʻi plantation records document its planted presence. Plantation persistence and naturalized recruitment represent different establishment processes, and current abundance and ecological effects require updated surveys. Bishop Museum’s 2025 checklist documents naturalized presence on Kauaʻi; current extent remains unassessed.
Kauaʻi evidence
Bishop Museum 2025 Checklist wide: Taxon=Eucalyptus robusta; Status=nat; K=K. Identification and ecological statements have the separately linked reviewed sources. The checklist establishes documented island presence; it does not establish current abundance or invasion extent. The 1918–1959 Kauaʻi reforestation working register records 211,142 plants under Eucalyptus robusta across 48 entries dated 1919–1956. These are recorded planting quantities, not counts of surviving trees, and they do not by themselves establish current persistence, naturalization, or ecological impact. Identical entries are retained in this source total; their event-level independence has not been established. Source: Kauaʻi Reforestation Plantings 1918–1959 working register (user-supplied; reconciled 6 October 2026).
Names and classification
- Scientific name
- Eucalyptus robusta
- Common names
- Swamp mahogany
- Other names
- Swamp mahogany · swamp messmate · Eucalyptus robusta
- Record type
- Species or taxonomic group
Kauaʻi occurrence and status
- Kauaʻi occurrence
- Recorded on Kauaʻi
- Origin
- Introduced
- Conservation status
- Conservation priority; formal rank not listed
- Evidence date
- 2026-10-05
- Evidence limits
- Current extent and population trajectory require refreshed surveys; public occurrence is island level only.
Habitat and ecology
- Habitats
- Forestry plantings · Wet lowlands · Roadsides
- Food and resource needs
- Light, water, nutrients, and suitable soil or substrate
- Reproduction
- Viable propagules and suitable establishment conditions
- Shelter
- Suitable soil, substrate, and vegetation structure
- Growth form
- Tree
Threats and conservation
- Threats
- Site-specific competition or fire/litter effects
- Conservation actions
- Map stands and evaluate effect before intervention
- Monitoring
- Map stands and evaluate effect before intervention
- Data gaps
- Additional ecological and conservation citations are recommended
Process and seasonal context
- Seasonal timing
- Not assessed
- Seasonal description
- Swamp mahogany (Eucalyptus robusta) is an eastern Australian tree introduced to Hawaiʻi for forestry. Historic Kauaʻi plantation records document its planted presence. Plantation persistence and naturalized recruitment represent different establishment processes, and current abundance and ecological effects require updated surveys. Bishop Museum’s 2025 checklist documents naturalized presence on Kauaʻi; current extent remains unassessed.
