Which genus has more species, Galanthus or Rhodanthemum?
Galanthus: Galanthus (snowdrop; Greek "gála" "milk", "ánthos" "flower") is a small genus of about 20 species of bulbous perennial herbaceous plants in the family Amaryllidaceae. Rhodanthemum:  Formerly included in either "Chrysanthemum" or "Leucanthemum", the 10 or 15 species of "Rhodanthemum" display many similarities to their former parents, with composite daisy-like flowers.
Galanthus