About 95% of the species are in five families: Crassulaceae (1400), Saxifragaceae (500), Grossulariaceae (150–200), Haloragaceae (150), and Hamamelidaceae (100).
Un 95% das especies inclúense en cinco familias: Crassulaceae (1400), Saxifragaceae (500), Grossulariaceae (150 - 200), Haloragaceae (150), e Hamamelidaceae (100).