Who has more species, Macleaya or Mammillaria?
Macleaya: Macleaya or plume poppies is a genus of two or three species of flowering plants in the poppy family Papaveraceae, native to China and Japan. Mammillaria: The genus Mammillaria is one of the largest in the cactus family (Cactaceae), with currently 200 known species and varieties recognized.
Mammillaria