The Waiʻanae Kokoʻolau (Bidens amplectens) is a species of flowering plant in the family Asteraceae. It belongs to the genus Bidens, collectively called kokoʻolau or koʻokoʻolau in the Hawaiian language. It is found only in dry forests in the Waiʻanae Range on Oʻahu. It is threatened by habitat loss due to the spread of invasive weeds and brushfires.