Kauaʻi record · kba_plant_grevillea_banksii
Red Silky Oak
Grevillea banksii
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About Red Silky Oak
Red Silky Oak (Grevillea banksii) 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 eastern Queensland woodland and open forest, also occurring in heath and on rocky slopes. On Kauaʻi it is checklist-documented as naturalized at island scale; current abundance, population structure, and ecological effects are not quantified.
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.
Names and classification
- Scientific name
- Grevillea banksii
- Common names
- Red Silky Oak · Banks’ grevillea · Scarlet grevillea
- Other names
- Grevillea banksii · Red silky oak · Banks’ grevillea · Scarlet grevillea · Hakea banksii (R.Br.) Christenh. & Byng · Stylurus banksii (R.Br.) O.Deg.
- 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 island-wide abundance, occupied habitat, recruitment, population trend, and ecological effects on Kauaʻi remain unassessed.
Habitat and ecology
- Habitats
- Not yet assessed
- Food and resource needs
- Not yet assessed
- Reproduction
- Large cylindrical clusters bear flowers with conspicuous long styles that mature into dry follicles with winged seeds. Successful recruitment requires pollination, follicle maturation, seed release, and seedling establishment; Kauaʻi phenology and recruitment are not documented.
- Shelter
- Not yet assessed
- Growth form
- Tree or shrub
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
- Red Silky Oak (Grevillea banksii) 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 eastern Queensland woodland and open forest, also occurring in heath and on rocky slopes. On Kauaʻi it is checklist-documented as naturalized at island scale; current abundance, population structure, and ecological effects are not quantified.
Sources and further reading
- https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:703712-1
- https://apps.lucidcentral.org/plants_se_nsw/text/entities/grevillea_banksii.htm
- https://profiles.ala.org.au/opus/foa/profile/Grevillea%20banksii
- https://hbs.bishopmuseum.org/publications/pdf/tr75.pdf
- https://editedimages.s3.us-east-1.amazonaws.com/Imadaetal.2025Hawaiianvascularplants.xlsx
- https://doi.org/10.5479/si.32124043