Two new genera and a new species of Anacardiaceae from northern South America

Cyrtocarpa is a generic name that has been applied to members of a complex of dry-habitat Neotropical taxa, but recent investigations have revealed that in fact this group represents three distinct genera. Tumultivenia and Uniostium , two new genera of Anacardiaceae-Spondioideae, are described and illustrated, as is one new species, Cyrtocarpa caribaea . Both new genera are strongly supported as distinct in a published phylogeny. Uniostium velutinifolium was originally published in Bursera and subsequently combined in both Tapirira and Cyrtocarpa , while Tumultivenia caatingae was originally published in Cyrtocarpa . The number of locules and number and position of opercula in the pyrene provide the salient characters distinguishing these genera. The new species is a distinctive member of Cyrtocarpa sensu stricto but requires more collections (including flowering material) as well as material for molecular studies.