Which genus has more species, Wahlenbergia or Horminum?
Wahlenbergia Wahlenbergia is a genus of between 150–270 species of flowering plants in the family Campanulaceae, with a cosmopolitan distribution except for North America; the highest species diversity is in Africa and Australasia. "Wahlenbergia" species have dispersed widely, even to oceanic islands, and there are four species known from the island of Saint Helena, including the now extinct species "W. roxburghii". The genus was named after Göran Wahlenberg (a Swedish botanist who taught at Uppsala University) by German botanist H. A. Schrader (Heinrich Schrader), in 1814.
Geranium retrorsum Geranium retrorsum is a species of "Geranium" known by the common name New Zealand geranium in the United States and common cranesbill in Australia. It is native to Australia but can be found on other continents as an introduced species which is often a noxious weed as well. This is a perennial herb growing generally erect to a maximum height approaching half a meter. The stems are green to reddish and have stiff hairs. The leaves are a few centimeters wide and divided into several segments which are further divided into small lobes. The small flowers are fuchsia to purple in color. The fruit has a straight style about a centimeter in length.