Which genus contains the most species, Chrysanthemoides or Phlox? 
Chrysanthemoides: Chrysanthemoides is one of eight genera of the Calenduleae, with a centre of diversity in South Africa. Chrysanthemoides:  The genera contains only two species, but is known for the invasive "Bitou Bush" "Chrysanthemoides monilifera". Phlox: Phlox ( ; Greek φλόξ "flame"; plural "phlox" or "phloxes", Greek φλόγες "phlóges") is a genus of 67 species of perennial and annual plants in the family Polemoniaceae.
Phlox