The Plantaginaceae Juss. or plantain family, is a
family of
flowering plants in the order
Lamiales. The type genus is
Plantago L..In older classifications it used to be the only family of the order Plantaginales, but numerous phylogenetic studies, summarized by the
Angiosperm Phylogeny Group, have demonstrated that this taxon should be included within the Lamiales.The plantain family as traditionally circumscribed consisted of only three genera, Bougueria, Littorella, and
Plantago. However, new phylogenetic research has indicated that Plantaginaceae s.s. (s.s. = sensu stricto, in the strict sense) is nested within several genera previously included in
Scrophulariaceae (but not including the type genus,
Scrophularia). Although Veronicaceae (1782) is the oldest family name for this group, Plantaginaceae (1789) is a conserved name under the
International Code of Botanical Nomenclature (ICBN) and thus has priority over any earlier family name within the circumscription of any group containing Plantaginaceae. Furthermore, the ICBN does not consider family names published before 1789 to be names eligible for conservation, thus ruling out Veronicaceae. The name Antirrhinaceae has been proposed for conservation over Plantaginaceae. In the meantime, the Angiosperm Phylogeny Group has accepted the name Plantaginaceae. However, Olmstead (2003) has chosen to use the name Veronicaceae.
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