Which is a genus native to more areas of the world, Ailanthus or Leonotis?
Ailanthus Ailanthus ( ; derived from "ailanto," an Ambonese word probably meaning "tree of the gods" or "tree of heaven") is a genus of trees belonging to the family Simaroubaceae, in the order Sapindales (formerly Rutales or Geraniales). The genus is native from east Asia south to northern Australasia.
Ptilagrostis Ptilagrostis is a genus of grasses in the family Poaceae. They are distributed in Asia and North America. They are known commonly as false needlegrasses.