Plagiochila perdentata sp. nov. (sect. Abietinae Carl) from Papua New Guinea is described and illustrated. Five species names are newly placed in synonymy: Plagiochila curvula Steph., P. incurva Steph., and P. leratii Steph. (conspecific with P. hampeana Gottsche), and P. saveziana Steph. and P. longistipula Steph. (conspecific with P. norfolkiensis Steph.). Plagiochila peradenyensis Schiffn. is transferred from sect. Contiguae Carl to sect. Abietinae. A key to the twelve known species of sect. Abietinae is provided.
Communicating Editor: Richard J. Jensen