Swartzieae
| Swartzieae | |
|---|---|
| File:13010-Swartzia picta-Caura.JPG | |
| Swartzia picta | |
| Scientific classification Edit this classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Faboideae |
| Tribe: | Swartzieae DC. |
| Type genus | |
| Swartzia Schreb.
| |
| Subclades and Genera | |
|
See text. | |
| File:Swartzieae distribution.svg | |
| Distribution of the Swartzieae | |
| Synonyms[citation needed] | |
| |
The tribe Swartzieae is an early-branching monophyletic clade of the flowering plant subfamily Faboideae or Papilionaceae. Traditionally this tribe has been used as a wastebasket taxon to accommodate genera of Faboideae which exhibit actinomorphic, rather than zygomorphic floral symmetry and/or incompletely differentiated petals and free stamens.[2][3] It was recently revised and most of its genera were redistributed to other tribes (Amburaneae, Baphieae, and Exostyleae).[2][4][5] Under its new circumscription, this clade is consistently resolved in molecular phylogenies.[2][4][6][7][8][9][10][1][11] Members of this tribe possess "non-papilionate swartzioid flowers[…]largely characterized by a tendency to lack petals combined with a profusion and elaboration of free stamens"[2][4] and a "lack of unidirectional order in the initiation of the stamens".[1] 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."[12] The tribe is predicted to have diverged from the other legume lineages 48.9±2.8 million years ago (in the Eocene).[10]
Subclades and genera
[edit | edit source]Swartzioids sensu stricto Ireland et al. 2000
[edit | edit source]The members of this clade occur mainly in lowland rain forests.[4][6][1]
- Bobgunnia J. H. Kirkbr. & Wiersema
- Bocoa Aubl.
- Candolleodendron R. S. Cowan
- Fairchildia Britton & Rose[1]
- Swartzia Schreb.
Atelioids Ireland et al. 2000
[edit | edit source]The members of this clade are distinguished by "a nearly actinomorphic androecium with basifixed anthers, exarillate seeds, and a tendency toward alternate leaflets."[4][1] They occur mainly in neotropical, seasonally-dry tropical woodlands.[4]
- Ateleia (DC.) Benth.
- Cyathostegia (Benth.) Schery
- Trischidium Tul.[13]
References
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