intra

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.

摘要同型孢子蕨类孢子可经由同子、异子两类育系统或以无生式产生，异子又可分为异子和异子异两种式。