Kauaʻi record · kba_plant_eucalyptus_microcorys

Australian Tallowwood

Eucalyptus microcorys

Open this record in the interactive Atlas

About Australian Tallowwood

Australian Tallowwood (Eucalyptus microcorys) is an introduced tree treated as naturalized on Kauaʻi by Bishop Museum’s 2025 checklist and the 2026 Smithsonian checklist. Current extent is unassessed. Native to humid subtropical forest of coastal southeastern Queensland and northeastern New South Wales, where it is a large forest tree. On Kauaʻi it is both checklist-documented as naturalized and historically documented in managed non-native forest stands; the dated forestry evidence establishes a forest population but does not measure present spread or ecological effects.

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 1,601 plants under Eucalyptus microcorys across 4 entries dated 1931–1944. 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 microcorys
Common names: Australian Tallowwood · Tallowwood
Other names: Eucalyptus microcorys · Australian tallowwood · Tallowwood
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: The latest reviewed stand-specific evidence is the 2015–2016 management record; present island-wide abundance, recruitment, occupied habitat, population trend, and ecological effects remain unassessed.

Habitat and ecology

Habitats: Not yet assessed
Food and resource needs: Not yet assessed
Reproduction: Terminal and axillary flower clusters develop into woody capsules holding many small seeds. Successful recruitment requires flowering, pollination, capsule maturation, seed release, and seedling establishment; Kauaʻi-specific flowering periods, seed dispersal, and recruitment have not been measured.
Shelter: Not yet assessed
Growth form: 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: Australian Tallowwood (Eucalyptus microcorys) is an introduced tree treated as naturalized on Kauaʻi by Bishop Museum’s 2025 checklist and the 2026 Smithsonian checklist. Current extent is unassessed. Native to humid subtropical forest of coastal southeastern Queensland and northeastern New South Wales, where it is a large forest tree. On Kauaʻi it is both checklist-documented as naturalized and historically documented in managed non-native forest stands; the dated forestry evidence establishes a forest population but does not measure present spread or ecological effects.

Sources and further reading

Suggest changes to this record