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.

摘要同型孢子蕨类的孢子由同子自、异子两类系统或以无生殖的方式产生，异子又分为异子自和异子异两种方式。