Which genus contains more species, Brachystelma or Macleaya?
Brachystelma:  (Apocynaceae: Asclepiadoideae - Ceropegieae) is represented by over a hundred species in the world, chiefly distributed in South Africa, South-East Asia and Australasia. 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.
i don't know