Kauaʻi record · kba_plant_eucalyptus_saligna

Sydney Blue Gum

Eucalyptus saligna

Open this record in the interactive Atlas

About Sydney Blue Gum

Sydney Blue Gum (Eucalyptus saligna) 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 moist subtropical forest and wet sclerophyll forest in eastern Australia. On Kauaʻi it is checklist-documented as naturalized and historically formed extensive managed forest stands. Dated inventory evidence demonstrates an established population but does not measure its present extent 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 13,511 plants under Eucalyptus saligna across 6 entries dated 1941–1958. 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 saligna
Common names: Sydney Blue Gum · Blue gum
Other names: Eucalyptus saligna · Sydney blue gum · Blue gum · Eucalyptus saligna var. protrusa Blakely & McKie
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 explicit forest-presence evidence is from 2015. Current island-wide acreage, natural regeneration, population trend, and ecological effects remain unassessed.

Habitat and ecology

Habitats: Not yet assessed
Food and resource needs: Not yet assessed
Reproduction: Axillary white flowers mature into woody capsules containing many small seeds. Recruitment requires pollination, capsule maturation, seed release, exposed suitable seedbeds, and seedling survival; Kauaʻi-specific phenology and recruitment are not documented.
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: Sydney Blue Gum (Eucalyptus saligna) 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 moist subtropical forest and wet sclerophyll forest in eastern Australia. On Kauaʻi it is checklist-documented as naturalized and historically formed extensive managed forest stands. Dated inventory evidence demonstrates an established population but does not measure its present extent or ecological effects.

Sources and further reading

Suggest changes to this record