Geranium multiflorum is a rare species of geranium known by the common names manyflower geranium, or manyflowered cranesbill. It is endemic to Hawaii, where it is known only from Haleakalā, the main volcano on the island of Maui. It was federally listed as an endangered species in 1992. Like other Hawaiian geraniums, this plant is known as hinahina and nohoanu. The main threat to this species is the degradation of its habitat by feral pigs, feral goats, and non-native plant species invading the area.