triphasic life cycle ~consisting of the gametophyte (n) (dioecious), carposporophyte (2n) and the tetrasporophyte (2n).  The fertilization of the egg in the carpogonium of the female gametophyte by the spermatium results in the production of the zygote or fusion cell, which in turn develops into the carposporophyte The carpospores (2n) produced by the carposporophytes develop into the tetrasporophytes. Meiosis takes place in the tetrasporangia, resulting to the production of tetraspores (n) which in turn develop into the gametophytes. This plant is isomorphic hence you cant distinguish the different phases, only different structures within the plant. (diagram of cycle is to the left)