Which genus contais more species, Crowea or Zamioculcas?
Crowea:  There are three species and many subspecies and cultivars, all of which are popular as ornamentals because of their abundant, attractive flowers which often occur during autumn and winter. Zamioculcas: Zamioculcas (common name "Zanzibar Gem", "Zuzu Plant" or Emerald Palm) is a genus of flowering plant in the family Araceae, containing the single species Zamioculcas zamiifolia.
i don't know