List of selected families

Other Families

Plantae Families (except Orchidaceae)
Family Common name
Ochnaceae DC.
Oleaceae Hoffmanns. & Link olive
Onagraceae Juss. evening primrose family
Ophioglossaceae Martinov
Opiliaceae Valeton
Orobanchaceae Vent. broomrapes
Osmundaceae Martinov
Oxalidaceae R.Br.
Oxycoccaceae A. Kern.