The Begoniaceae are a family of flowering plants with about 1400 species occurring in the subtropics and tropics of both the New World and Old World. All but one of the species are in the genus Begonia. The only other genus in the family, Hillebrandia, is endemic to the Hawaiian Islands and has a single species. Phylogenetic work supports Hillebrandia as the sister taxon to the rest of the family. The genus Symbegonia has recently been reduced to a section of Begonia, as recent molecular phylogenies have shown it to be derived from within that genus.
- Angiosperm Phylogeny Group (2009), "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III", Botanical Journal of the Linnean Society 161 (2): 105–121, doi:10.1111/j.1095-8339.2009.00996.x, retrieved 2010-12-10
- Phylogenetic position and biogeography of Hillebrandia sandwicensis (Begoniaceae): a rare Hawaiian relict
- Phylogenetic Relationships of the Afro-Malagasy Members of the Large Genus Begonia Inferred from trnL Intron Sequences
- A Phylogeny of Begonia Using Nuclear Ribosomal Sequence Data and Morphological Characters
- A recircumscription of Begonia based on nuclear ribosomal sequences
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