Phyllostegia hirsuta is a species of flowering plant in the mint family known by the common names Molokai phyllostegia and hairy phyllostegia. It is endemic to Hawaii, where it is known only from the island of Oahu. It is a federally listed endangered species of the United States. This plant is a subshrub or vine with hairy, glandular, oval-shaped leaves up to 30 centimeters long by 18 wide. The flower is white with purple tinting on its upper lip.