in botany; a genus of the monogynia order, belonging to the tetandra clas of plants. The amentum is scaly, the corolla consists of four petals; the antherae are in the cavity of the folds, and foible; the capsule is bivalvular; and the seed is solitary, and bipartite. There are four species, the ferrata, integri folia, eride folia, and dentata, all natives of New Holland.