Which of the following plants are flowerless, fruitless and seedless respectively 

 Salvinia is pteridophyte . Pteridophytes comes under non - flowering plants or cryptogams (flower less)

Pinus is gymnosperms . Seeds are naked in gymnosperms not protected by fruit (fruit less )

Pteris is pteridophyte . Seed formation starts from gymnosperms , seed plants are called spermatophytes , gymnosperms and angiosperms comes under spermatophytes (seed less )