Melhania polygama is a plant in the mallow family Malvaceae, native to South Africa.
Melhania polygama grows as a shrub about 35cm (14inches) tall, with numerous stems. The leaves are stellate tomentose and measure up to 9cm (04inches) long. Inflorescences measure up to 6cm (02inches) long, are typically one to three-flowered and feature yellow petals. Uniquely within the genus Melhania, the flowers are polygamous.
Melhania polygama is known only from Hluhluwe–Imfolozi Park (formerly Umfolozi GameReserve) in KwaZulu-Natal. Its habitat is on grassy hill slopes.