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.
摘要型孢
蕨类的孢
体可经由
体自交、异
体交
两类
育系统或以无
殖的方
,异
体交
又可分为异
体自交和异
体异交两种方
。