On the taxonomic affinity of Britton (Leguminosae, Caesalpinioideae-mimosoid clade).

Recent phylogenomic analyses placed Britton as the sister-group of the two currently known species of Harms, clearly outside AlbiziasectionArthrosamanea (Britton & Rose) Barneby & J.W. Grimes where it has until now been included. Its morphological similarities to are discussed, including characteristics of the polyad, and it is concluded that the species is compatible with the generic description of that genus except for its much more finely divided leaves with smaller leaflets, and its smaller flowers and fruits. Since these are merely quantitative differences, the species can readily be accommodated in . The new combination (Britton) E.J.M. Koenen is made, and a diagnosis distinguishing it from the other two species of is presented.