The study of fern Pleurosoriopsis (Pleurosoriopsidaceae) gametophyte and its significance for systematics of the genus

摘要

The development and structure of gametophyte is investigated to specify the systematic position of species Pleurosoriopsis. It is shown that spores of Pleurosoriopsis are of bilateral type. The germination is of equatorial-type, specific to the given species, is identified as Pleurosoriopsis-type. Prothallial development of the Kaulinia-type. The adult prothallus is ribbon-like, elongated, sex organs are of the common Leptosporangiate-type. Vegetative reproduction of the adult thallus takes place by the production of gemmae. The affinity with family Vittariaceae is quite likely.