Does Aronia or Hermannia have more species?
Aronia Aronia is a genus of deciduous shrubs, the chokeberries, in the family Rosaceae native to eastern North America and most commonly found in wet woods and swamps. The genus is usually considered to contain two or three species, one of which is naturalized in Europe. A fourth form that has long been cultivated under the name "Aronia" is now considered to be an intergeneric hybrid, "Sorbaronia mitschurinii".
Gustavia (plant) Gustavia is a genus of flowering plants of Lecythidaceae family described by Linnaeus in 1775. It is native to tropical Central America and South America. Many of the species are threatened; some are critically endangered "Gustavia superba", though, is actually abundant in re-growing secondary forests. It grows in northern South America, from Panama south through the Andes as far as Ecuador, and along the Caribbean coast and in the Amazon basin.