Which genus has more species, Datura or Castanopsis?
Datura: Datura is a genus of nine species of poisonous vespertine flowering plants belonging to the family Solanaceae. Castanopsis:  The genus contains about 120 species, which are today restricted to tropical and subtropical eastern Asia. Castanopsis:  The English name chinkapin is shared with other related plants, including the golden chinkapins of the Pacific United States, which are sometimes included within "Castanopsis" but are more often considered a separate but very closely related genus, "Chrysolepis".
i don't know