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The order Saxifragales has 15 families about 100 genera and 2,500 species.
There are 8 families that are monotypic with only a single genus.
Family:
Peridiscaceae
Genus:
Medusandra with two species
Genus:
Peridiscus with only 1 species, Peridiscus lucidus
Genus:
Soyauxia with about 8 species. Type species: Soyauxia gabonensis
Genus:
Whittonia with only 1 species, Whittonia guianensis
Family:
Paeoniaceae
Genus:
Paeonia
Family:
Altingiaceae
Genus:
LIquidambatr
Family:
Hamamelidaceae (Witch-hazel)
Type Genus:
Hamamelis has 5 species
Genus:
There are 17 genera in this family of shrubs and small trees.
Family:
Cercidiphyllaceae
Genus:
Ceridiphyllum with 2 species
Family:
Daphiniphyllaceae
Genus:
Daphniphyllum with 28 species
Family:
Crassulaceae (stonecrop or orpine family)
Type Genus:
Crassula with about 200 species
Genus:
35 total genus with about 1,400 species
Family:
Aphanopetalaceae
Genus:
Aphanopetalum with 2 species
Family:
Tetracarpaeaceae
Genus:
Tetracarpaea with one species T.tetracarpaea
Family:
Penthoraceae
Genus:
Penthorum with 2 species
Family:
Haloragaceae
Genus:
Glischrocaryon with 4 species
Genus:
Gonocarpus with 36 species
Genus:
Haloragis with 26 species
Genus:
Haloragodendron with 5 species
Genus:
Laurembergia with 4 semiaquatic species
Genus:
Meziella with 1 aquatic species
Genus:
Myrophyllum with 60 aquatic species
Genus:
Proserpinaca with 3 aquatic species
Family:
Iteaceae
Genus:
Itea with about 10 species
Genus:
Pterostemon
Family:
Grosulariaceae
Genus:
Ribes with about 200 species, currants, gooseberries
Family:
Saxifragaceae
Type Genus:
Saxifrage with about 400 species
Genus:
There are a total of 35 genera with 640 species
Family:
Cynomoriaceae
Genus:
Cynomorium has only 1 species Cynomorium coccineum
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