Kauaʻi record · kba_plant_eucalyptus_marginata
Jarrah
Eucalyptus marginata
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About Jarrah
Jarrah (Eucalyptus marginata) is a post-contact introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. Native to southwestern Australia in subtropical jarrah forest and woodland. A 1980 forestry ledger documents Kauaʻi planting in 1941, 1945; it does not establish current survival, reproduction, or naturalization.
Kauaʻi evidence
Taxonomic identity, tree form, diagnostic morphology and island occurrence use the linked reviewed sources. Historical planting, cultivation, naturalization and invasive status are separate. Generated imagery is not occurrence evidence. The 1918–1959 Kauaʻi reforestation working register records 11,701 plants under Eucalyptus marginata across 3 entries dated 1941–1945. These are recorded planting quantities, not counts of surviving trees, and they do not by themselves establish current persistence, naturalization, or ecological impact. Source: Kauaʻi Reforestation Plantings 1918–1959 working register (user-supplied; reconciled 6 October 2026).
Names and classification
- Scientific name
- Eucalyptus marginata
- Common names
- Jarrah
- Other names
- Eucalyptus marginata · Jarrah
- Record type
- Species
Kauaʻi occurrence and status
- Kauaʻi occurrence
- Recorded on Kauaʻi
- Origin
- Introduced
- Conservation status
- Not yet assessed
- Evidence date
- 2026-10-06
- Evidence limits
- Current survival on Kauaʻi, number of trees, occupied habitat, flowering or fruiting, recruitment, population trend, and ecological effects are all unconfirmed; no naturalization or invasive severity is inferred from the historical planting record.
Habitat and ecology
- Habitats
- Not yet assessed
- Food and resource needs
- Not yet assessed
- Reproduction
- Capped flower buds open to white stamen-rich flowers; after pollination, woody cup-shaped to hemispherical fruits mature and release small seeds through rim-level valves. Kauaʻi flowering, pollination, seed production, dispersal, viability and recruitment remain unconfirmed.
- Shelter
- Not yet assessed
- Growth form
- Lignotuberous tree
Threats and conservation
- Monitoring
- Not yet assessed
- Data gaps
- Current population extent and trajectory · Additional species-specific ecological and conservation sources
Process and seasonal context
- Seasonal timing
- Not yet assessed
- Seasonal description
- Jarrah (Eucalyptus marginata) is a post-contact introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. Native to southwestern Australia in subtropical jarrah forest and woodland. A 1980 forestry ledger documents Kauaʻi planting in 1941, 1945; it does not establish current survival, reproduction, or naturalization.