What is "ginger-families"

The ginger-families or ginger group or Core Zingiberales is a clade in the order Zingiberales (: Monocotyledoneae) that comprises Zingiberaceae (the ginger family), Costaceae, Marantaceae and Cannaceae. Their shared synapomorphy of a single fertile anther and four or five highly modified staminodia differentiate them from the basal paraphyletic assemblage of the " banana-families".