Alectryon macrococcus, known as ʻAlaʻalahua or Māhoe in Hawaiian, is a species of flowering tree in the soapberry family, Sapindaceae, that is endemic to Hawaii. Alectryon macrococcus var. auwahiensis has been found growing naturally only (endemic) in Maui, where it grows in Hawaiian tropical dry forests on the south slope of Haleakalā at elevations of 360–1,070 m (1,180–3,510 ft). It is threatened by habitat loss. Alectryon macrococcus var. macrococcus inhabits mesic forests at elevations of 365–1,035 m (1,200–3,400 ft) on Kauaʻi, Oʻahu, Molokaʻi and western Maui.