Garryaceae Lindl., 1834, nom. cons.
Geissolomataceae Endl., 1841
Geitonoplesiaceae R. Dahlgr. ex Conran, 1994
Gelsemiaceae (G. Don) Struwe & V. Albert, 1995
Geniostomaceae Struwe & V. Albert, 1995
Gentianaceae Juss., 1789, nom. cons.
Chironiaceae Horan., 1843
Coutoubeaceae Martinov, 1820
Obolariaceae Martinov, 1820
Potaliaceae Mart., 1827
Geraniaceae Juss., 1789, nom. cons.
Biebersteiniaceae Endl., 1841
Erodiaceae Horan., 1847
Ledocarpaceae Meyen, 1834
Rhynchothecaceae Endl., 1841
Vivianiaceae Klotzsch, 1836
Gesneriaceae Dumort., 1822, nom. cons.
Belloniaceae Martinov, 1820
Besleriaceae Raf., 1838
Cyrtandraceae Jack, 1823
Didymocarpaceae D. Don, 1822
Ramondaceae Godr., 1850
Ginkgoaceae Engl., 1897, nom. cons.
Salisburiaceae Link, 1831, nom. illeg.
Gisekiaceae (Endl.) Nakai, 1942
Glaucidiaceae Tamura, 1972
Gleicheniaceae (R. Br.) C. Presl, 1825
Dicranopteridaceae R.C. Ching, 1954
Globulariaceae DC., 1805, nom. cons.
Gnetaceae Lindl., 1834, nom. cons.
Goetzeaceae Miers ex Airy Shaw, 1964
Gomortegaceae Reiche, 1896, nom. cons.
Gonystylaceae Gilg, 1897, nom. cons.
Goodeniaceae R. Br., 1810, nom. cons.
Brunoniaceae Dumort., 1829, nom. cons.
Scaevolaceae Lindl., 1830
Goupiaceae Miers, 1862
Gramineae Juss.
Grammitidaceae (Presl) Ching
Greyiaceae Hutch., 1926, nom. cons.
Griseliniaceae J.R. Forst. & G. Forst. ex A. Cunn., 1839
Grossulariaceae DC., 1805, nom. cons.
Ribesiaceae Marq., 1820
Grubbiaceae Endl., 1839, nom. cons.
Ophiraceae Arn., 1841
Gunneraceae Meisn., 1842, nom. cons.
Guttiferae Juss.
Gyrostemonaceae Endl., 1841