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The genus  Adenodaphne  is currently considered endemic to New Caledonia, but its distinction from  Litsea  is questionable based on morphological similarity. An earlier phylogenetic analysis (ITS) including one species of  Adenodaphne  and two Asian species of  Litsea  did support their close relationship but did not permit resolution of their generic boundary. We sampled the four species of  Adenodaphne  currently recognized (11 accessions) and 11 of the 13 endemic species of  Litsea  currently recognized, plus one undescribed species (24 accessions in total). Based on our extensive herbarium studies, fieldwork, and especially our molecular phylogenetic analyses (ITS), we conclude that  Adenodaphne  is not distinct from  Litsea  and that all species of  Adenodaphne  should be recognized within  Litsea , thereby necessitating the creation of two new species synonymies and one nomen novum. In addition,  Litsea paoueensis  is here synonymized with  L. deplanchei . Finally, our phylogenetic analysis suggests that the sole species of  Litsea  from New Zealand, which is endemic, results from a rarely documented long-distance dispersal event from New Caledonia.

Phylogenetic study of the New Caledonian endemic genus Adenodaphne (Lauraceae) confirms its synonymy with Litsea