Question

Give distinguishing characters of psilopside, and add a note on the gametophyte of psilotum.

Answer 1

Though several species have been reported in Psilotum, all of them usually fall into two well defined species, viz., P. nudum (P. triquertum) and P.flaccidum (P. complanatum). The earlier reports of the existence of several species is probably due to the polymorphic nature of the sporophyte.