Which genus contains more species, Calanthe or Lavatera?
Calanthe: Calanthe – commonly abbreviated Cal. Calanthe:  in horticulture – is a widespread genus of terrestrial orchids (family Orchidaceae) with some 200 species. Lavatera: Lavatera is a genus of about 25 species of flowering plants in the family Malvaceae, native to the Mediterranean region, central and eastern Asia, North America (California and Mexico) and Australia.
Calanthe