Spiraeanthemum is a genus of trees and shrubs in the family Cunoniaceae. it includes about 19 species from Australia, New Guinea, Solomon Islands, New Caledonia, Vanuatu, Fiji and Samoa. Leaves are simple, opposite or whorled, with toothed or entire margins. Inflorescences are paniculate, flowers unisexual or hermaphrodite, and the fruits are follicular with free carpels. It belongs to the tribe Spiraeanthemeae, and now includes the species formerly placed in Acsmithia.