Kauaʻi record · kba_plant_eucalyptus_rudis

Flooded Gum

Eucalyptus rudis

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About Flooded Gum

Flooded Gum (Eucalyptus rudis) 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 stream banks and floodplains in southwestern Australia, usually on silty soils over clay. Kauaʻi naturalized status is documented at island scale, but the reviewed sources do not identify the subspecies present or quantify current habitat occupancy and 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 30,447 plants under Eucalyptus rudis across 8 entries dated 1935–1940. 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 rudis
Common names: Flooded Gum · Moitch
Other names: Eucalyptus rudis · Flooded gum · Moitch
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 Kauaʻi material is not assigned to either accepted subspecies here. Current abundance, population persistence, occupied habitat, recruitment, trend, and ecological effects remain unassessed.

Habitat and ecology

Habitats: Not yet assessed
Food and resource needs: Not yet assessed
Reproduction: White flowers develop into woody capsules holding many small seeds. Recruitment requires pollination, capsule maturation, seed release, and establishment on suitable moist seedbeds; Kauaʻi-specific flowering and recruitment are unmeasured.
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: Flooded Gum (Eucalyptus rudis) 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 stream banks and floodplains in southwestern Australia, usually on silty soils over clay. Kauaʻi naturalized status is documented at island scale, but the reviewed sources do not identify the subspecies present or quantify current habitat occupancy and effects.

Sources and further reading

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