Which pteridophyte shows presence of vessels
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The genera bear vessel elements in seedless vascular plants are widely distributed among distantly related families of pteridophytes which are of recent origin. Till date no extinct members of pteridophytes are reported for the presence of vessel elements.
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Prothallus is the gametophytic stage of pteridophytes.
It is a thalloid structure and there is no distinction of roots, stems and leaves.
It is attached to the substratum with the help of multicellular rhizoids.
It produces male and female gametes which fuse to form a zygote. The diploid zygote develops into sporophyte which produces spores that germinate into haploid gametophyte.
It has vascular system consisting of tracheary elements i.e. tracheids and vessels.
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