The

tribe The term tribe is used in many different contexts to refer to a category of human social group. The predominant worldwide use of the term in English is in the discipline of anthropology. The definition is contested, in part due to conflict ...

Swartzieae is an early-branching

monophyletic In biological cladistics for the classification of organisms, monophyly is the condition of a taxonomic grouping being a clade – that is, a grouping of organisms which meets these criteria: # the grouping contains its own most recent co ...

clade In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach t ...

of the

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...

subfamily

Faboideae The Faboideae are a subfamily of the flowering plant family Fabaceae or Leguminosae. An acceptable alternative name for the subfamily is Papilionoideae, or Papilionaceae when this group of plants is treated as a family. This subfamily is widely ...

or Papilionaceae. Traditionally this tribe has been used as a

wastebasket taxon Wastebasket taxon (also called a wastebin taxon, dustbin taxon or catch-all taxon) is a term used by some taxonomists to refer to a taxon that has the purpose of classifying organisms that do not fit anywhere else. They are typically defined by e ...

to accommodate genera of

which exhibit

actinomorphic Floral symmetry describes whether, and how, a flower, in particular its perianth, can be divided into two or more identical or mirror-image parts. Uncommonly, flowers may have no axis of symmetry at all, typically because their parts are spirall ...

, rather than

zygomorphic Floral symmetry describes whether, and how, a flower, in particular its perianth, can be divided into two or more identical or mirror-image parts. Uncommonly, flowers may have no axis of symmetry at all, typically because their parts are spir ...

floral symmetry and/or incompletely differentiated petals and free stamens. It was recently revised and most of its genera were redistributed to other tribes ( Amburaneae, Baphieae, and Exostyleae). Under its new circumscription, this clade is consistently resolved in

molecular phylogenies Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

. Members of this tribe possess "non-papilionate swartzioid flowers ��argely characterized by a tendency to lack petals combined with a profusion and elaboration of free stamens" and a "lack of unidirectional order in the initiation of the stamens". They also have "complete or near complete fusion of sepals resulting from intercalary growth early in development, relatively numerous stamens, and a single or no petal, with other petals not at all apparent in development." The tribe is predicted to have diverged from the other legume lineages 48.9±2.8 million years ago (in the

Eocene The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes ...

Subclades and genera

Swartzioids ''sensu stricto'' Ireland ''et al''. 2000

The members of this clade occur mainly in lowland rain forests. * '' Bobgunnia'' J. H. Kirkbr. & Wiersema * '' Bocoa'' Aubl. * ''

Candolleodendron ''Candolleodendron brachystachyum'' is a species of flowering plant in the legume family, Fabaceae. It belongs to the subfamily Faboideae. It is the only member of the genus ''Candolleodendron''. It is a tree native to the Amazon rain forest of n ...

'' R. S. Cowan * '' Fairchildia'' Britton & Rose * '' Swartzia'' Schreb.

Atelioids Ireland ''et al''. 2000

The members of this clade are distinguished by "a nearly actinomorphic androecium with basifixed anthers, exarillate seeds, and a tendency toward alternate leaflets." They occur mainly in neotropical, seasonally-dry tropical woodlands. * '' Ateleia'' (DC.) Benth. * '' Cyathostegia'' (Benth.) Schery * '' Trischidium'' Tul.

References

{{Taxonbar, from=Q7653958 Faboideae Fabaceae tribes