Astronidium saulae is a species of flowering plant in the family Melastomataceae. It is a slender tree, 3 to 10 metres tall, which is endemic to Fiji. It grows in dense lowland rain forest on Mt. Korombamba (Korobaba) on Viti Levu. It was known from a small population in an area which was subsequently logged, and the current status of the species is not known.