1.2- Tribe Sesbanieae + Overview Tribe Sesbanieae is one of 30 tribes in the subfamily Faboideae of the pea family, Fabaceae. Polhill & Sousa (1981) recognised 21 genera and 145 species in tribe Robinieae (including Sesbanieae). This treatment, following modifications of Lavin (1988, 1993, 1995, unpublished data) and Lavin & Sousa (1995), recognises a separate tribe Sesbanieae, comprising one genus, Sesbania, with 60 species. Recent molecular phylogenies of robinioid legumes suggest that Sesbania is either sister to Robinieae (e.g., Lavin et al., 2003), or to the Loteae (including Coronilleae) clade with both being strongly supported as sister to the Robinieae (Wojciechowski et al., 2004). This, in addition to the putative position of Sesbania as the sister clade to the rest of Robinieae in the morphological analysis of Lavin & Sousa (1995), warrants its segregation here as a distinct tribe. + Taxonomy Tribe Sesbanieae comprises one genus, Sesbania, with 60 species.