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.

要同型孢子蕨类的孢子体可经由同子体自交、子体交两类系统或以无生殖的方式产生，子体交又可分为子体自交子体交两种方式。