About 95% of the species are in five families: Crassulaceae (1400), Saxifragaceae (500), Grossulariaceae (150–200), Haloragaceae (150), and Hamamelidaceae (100).
Khoảng 95% các loài nằm trong 5 họ: Crassulaceae (1.400), Saxifragaceae (500), Grossulariaceae (150-200), Haloragaceae (150), Hamamelidaceae (100).