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.

摘要同型孢蕨类的孢可经由同配交、异配交配两类配系统或以无配殖的方，异配交配又可分为异配交和异配异交两种方。