Homosporous ferns produce sporophytes by intra gametophytic selfing, inter gametophytic mating, or apogamy.Gametangium ontogeny, genetic load, and ploidy affect the mating system of each species.

摘要同型孢孢体可经由同体自交、异体交育系统或以无生殖方式产生，异体交又可分为异体自交和异体异交种方式。