The "Tetramerium Lineage" (Acanthaceae: Acanthoideae: Justicieae): Delimitation and Intra-lineage Relationships Based on cp and nrITS Sequence Data.

The article looks into the phylogenetic relationships of the Tetramerium lineage (Acanthaceae: Justicieae) through DNA sequence data from five genic regions. Analyses used in the study suggest monophyly of the New World Tetramerium lineage. The result's taxonomic implications suggest, among others, that many traditionally recognized genera are not monophyletic and emphasis on floral form has been phylogenetically misleading.