Kauaʻi record · kba_plant_heliotropium_arboreum
Tree Heliotrope
Heliotropium arboreum
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About Tree Heliotrope
Tree Heliotrope (Heliotropium arboreum) 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 across tropical Indian and Pacific coastal regions, especially sandy beaches and littoral vegetation. On Kauaʻi it is treated as naturalized by the Bishop 2025 checklist and corroborated by Smithsonian 2026; this does not establish abundance or ecological effect.
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
- Heliotropium arboreum
- Common names
- Tree Heliotrope · Octopus tree
- Other names
- Heliotropium arboreum · Tree heliotrope · Octopus tree · Tournefortia argentea L.f. · Argusia argentea (L.f.) Heine · Heliotropium foertherianum Diane & Hilger · Tournefortia arborea Blanco
- 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 coastal 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
- Small white flowers in curved clusters develop into buoyant corky fruits adapted to coastal dispersal. Recruitment requires flowering, fruit maturation, dispersal, and establishment in open coastal substrate; Kauaʻi-specific phenology 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
- Tree Heliotrope (Heliotropium arboreum) 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 across tropical Indian and Pacific coastal regions, especially sandy beaches and littoral vegetation. On Kauaʻi it is treated as naturalized by the Bishop 2025 checklist and corroborated by Smithsonian 2026; this does not establish abundance or ecological effect.
Sources and further reading
- https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77164241-1
- https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77164241-1/general-information
- 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