What is "trisyngyne"

Trisyngyne is a genus of twenty five species of evergreen trees and shrubs native to the Southern Hemisphere. They belong to the family Nothofagaceae, which are commonly known as the Southern Beeches. Species from this genus are located in Papua New Guinea, Indonesian Papua and New Caledonia.

Prior to 2013, Trisyngyne was considered to be a subgenus of Nothofagus under the name Nothofagus subgenus Brassospora. Trisyngyne was moved to genus level as a result of the revision of the Nothofagaceae taxonomy by Peter B. Heenan & Rob D. Smissen, which was published in 2013. Their approach was a phylogenetic analysis of morphological characters, mapped onto a recently published phylogenetic tree that was created from DNA sequence data. Recognition of Trisyngine as a full genus results from a controversial proposal by Heenan & Smissen (2013), a proposal which is rejected by Hill, Jordan & Macphail (2015).