Mark Alan Hershkovitz

For more than 30 years, Montiaceae specialists have agreed that Australian species classified in Calandrinia Kunth pertain to a distinct and divergent lineage whose oldest validly published name is Rumicastrum Ulbrich. In 1998, more than half of accepted species were transferred erroneously to a new genus, Parakeelya Hershk. However, taxonomists and databases have continued to classify the species in Calandrinia, confounding the taxonomy of the latter. Here, 65 Australian species classified in Calandrinia are transferred to Rumicastrum. This consummates the phylogenetic revision of Montiaceae taxonomy initiated more 30 years ago.