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.
摘要同型孢的孢
体可经由同
体自交、异
体交
育系统或以无
生殖的方式产生,异
体交
又可分为异
体自交和异
体异交
种方式。