Sapindus saponaria var. saponaria
Mānele, Aʻe, or Soapberry
Sapindaceae (Soapberry family)
Indigenous to the Hawaiian Islands (Hualālai, Mauna Loa, Kīlauea on Hawaiʻi Island)
Apparently the pulp of the fruit was used by early Hawaiians as a soap for shampooing hair and washing clothes in the past.