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We present the most complete molecular phylogeny to date of the   Pithecellobium   clade of subfamily   Caesalpinioideae  . This neotropical group was informally recognised (as the   Pithecellobium   alliance) at the end of the 20 th  century by  Barneby and Grimes (1996)  and includes five genera and 33 species distributed from the southern United States and Caribbean Islands to north-eastern South America. Our aims were to further test the monophyly of the group and its genera and to identify sister group relationships within and amongst the genera. A phylogenetic analysis of nuclear ribosomal DNA sequences (ITS and ETS) was performed. The results provide further support for the monophyly of the   Pithecellobium   clade. The genera    Ebenopsis   ,    Pithecellobium    and    Sphinga    were strongly supported as monophyletic.    Havardia    and    Painteria    were found to be non-monophyletic, prompting their re-circumscriptions and the description of two new genera:    Gretheria    and    Ricoa   . New combinations are made for the three species transferred to the new genera.

Revisiting the phylogeny and taxonomy of the Pithecellobium clade ( Leguminosae , Caesalpinioideae ) with new generic circumscriptions