Platycarya is a genus of flowering plants in the family Juglandaceae, usually treated as comprising a single species Platycarya strobilacea, though one to two additional species are accepted by some authors.
 It is native to eastern Asia in China, Korea, and Japan.
Mucuna is a genus of around 100 accepted species of climbing lianas (vines) and shrubs of the family Fabaceae and typically found in tropical woodlands.

Question: Which genus has more species, Mucuna or Platycarya
Answer: Mucuna