The main plant body in Pteridophytes is the sporophyte.
They reproduce asexually through Sporangia.
Plants can be homosporous (producing only one type of spore) or heterosporous
Prothallus, a haploid gametophyte, is formed when the spores germinate.
Bisexual (monoecious) gametophytes are produced by homosporous pteridophytes, whereas unisexual (dioecious) gametophytes are produced by heterosporous pteridophytes.
Final Answer: Spores on germination form prothallus in pteridophyta.