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Plantaginaceae, the plantain family or veronica family, is a large, diverse family of flowering plants in the order Lamiales that includes common flowers such as snapdragon and foxglove. It is unrelated to the banana-like fruit also called "plantain". In older classifications, Plantaginaceae was 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 Lamiales.
OverviewEdit
The plantain family as traditionally circumscribed consisted of only three genera: Bougueria, Littorella, and Plantago. However phylogenetic research has indicated that Plantaginaceae sensu stricto (in the strict sense) were nested within Scrophulariaceae (but forming a group that did not include the type genus of that family, 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 for a family including Plantago. 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) chose to use the name Veronicaceae, a later synonym.<ref>Template:Cite journal</ref> The Plantaginaceae is additionally called the veronica family in English.<ref>Template:Cite book</ref>
A group of genera including Lindernia has now been segregated<ref name="albach" /><ref name="Oxelman">Template:Cite journal</ref> as the family Linderniaceae,<ref>Template:Cite journal</ref> which is recognized by Haston et al. 2007 (also known as LAPG II) as "Post-APG II family".
Plantaginaceae sensu lato (in the broad sense) are a diverse, cosmopolitan family, occurring mostly in temperate zones. The group consists of herbs, shrubs and also a few aquatic plants with roots (such as the genus Callitriche). As the family is so diverse, its circumscription is difficult to establish.<ref name="albach">Template:Cite journal</ref>
The leaves are spiral to opposite and simple to compound. Unusual in Lamiales is the absence of vertical partitions in the heads of the glandular hairs.
The structure and form of the flowers is variable. Some genera are 4-merous (i.e., with 4 sepals and 4 petals), such as Aragoa (but this one has 5 sepals); others are 5- to 8-merous, such as Sibthorpia. The flowers of most genera are polysymmetric. The corolla is often two-lipped. In some taxa, the androecium is formed before the corolla.
The fruit is a loculicidal capsule, dehiscing through the partitions between the cells.<ref>Template:Cite journal</ref>
GeneraEdit
The enlarged Plantaginaceae consists of 107 genera<ref name = powo>Plantaginaceae Juss. Plants of the World Online. Retrieved 14 May 2024.</ref> and about 1,900 species.<ref name="Christenhusz-Byng2016">Template:Cite journal</ref> The largest genus is Veronica, with about 450 species. Veronica also includes the genera Hebe, Parahebe and Synthyris, formerly often treated as distinct. All genera of Plantaginaceae were formerly included in Scrophulariaceae except where otherwise stated.
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Although GRIN includes Lafuentea Lag. in the tribe Antirrhineae,<ref name=GRINantirrhinum/> in the phylogenetic analysis of Fernández-Mazuecos et al. (2013)<ref>Template:Cite journal</ref> it was a sister to the Antirrhineae, as also noted by Albach (2005).<ref name="albach"/> For the time being it should be considered an outgroup.
Excluded generaEdit
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ReferencesEdit
BibliographyEdit
External linksEdit
Template:Angiosperm families Template:Taxonbar Template:Authority control