Which genus has more species, Petunia or Kigelia? 
Petunia: Petunia is genus of 35 species of flowering plants of South American origin, closely related to tobacco, cape gooseberries, tomatoes, deadly nightshades, potatoes and chili peppers in the same family, Solanaceae. Kigelia: Kigelia is a genus of flowering plants in the family Bignoniaceae.
i don't know