Oncotheca is a genus of tree endemic to New Caledonia. There are two species, O. macrocarpa and O. balansae. Oncotheca is placed alone in family Oncothecaceae. This family has previously been placed in the Theales order, and in its own order, Oncothecales, but is currently placed in order Icacinales.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0