Kauaʻi record · kba_plant_sapindus_saponaria

Soapberry

Sapindus saponaria

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About Soapberry

Soapberry (Sapindus saponaria) is a post-contact introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. The accepted species occurs broadly in the central Pacific and tropical/subtropical Americas. Bishop Museum associates its indigenous Hawaiian populations with mesic forest. Government forestry records document historical planting on Kauaʻi within the 1910–1960 ledger period; no exact species planting year has been extracted. Bishop Museum treats Kauaʻi occurrence as cultivation only, while treating Oʻahu, Maui and Hawaiʻi populations as indigenous. These records do not establish present survival, naturalization, abundance or ecological impact. Public occurrence is island-level only.

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 70 plants under Sapindus saponaria across 1 entries dated 1943. 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: Sapindus saponaria
Common names: Soapberry · Wingleaf soapberry
Hawaiian names: aʻe · mānele
Other names: Sapindus saponaria · Soapberry · Wingleaf soapberry · aʻe · mānele
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 survival on Kauaʻi, numbers, occupied habitat, reproduction and ecological effects are unconfirmed; historical planting does not establish naturalization.

Habitat and ecology

Habitats: Not yet assessed
Food and resource needs: Not yet assessed
Reproduction: Male and female flowers occur on the same tree; one seed develops in each indehiscent fruit segment. Kauaʻi flowering, viable seed production, dispersal and recruitment are unconfirmed.
Shelter: Not yet assessed
Growth form: Evergreen or deciduous 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: Soapberry (Sapindus saponaria) is a post-contact introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. The accepted species occurs broadly in the central Pacific and tropical/subtropical Americas. Bishop Museum associates its indigenous Hawaiian populations with mesic forest. Government forestry records document historical planting on Kauaʻi within the 1910–1960 ledger period; no exact species planting year has been extracted. Bishop Museum treats Kauaʻi occurrence as cultivation only, while treating Oʻahu, Maui and Hawaiʻi populations as indigenous. These records do not establish present survival, naturalization, abundance or ecological impact. Public occurrence is island-level only.

Sources and further reading

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