sporogony
/ˌspɒroʊˈɡɒni/; also /ˌsproʊrəˈɡɒni/Definitions
1. noun
the phase in the life cycle of certain plants, such as ferns and mosses, during which the sporophyte (the diploid generation) grows and produces spores
“The botanist studied the process of sporogony in the development of ferns.”