The Reproduction of all Plants happens with an alternation of generations. This is a life cycle where there is a multicellular diploid form known as a sporophyte, and a multicellular haploid form known as the gametophyte. Since the Virginia Pine is also a Gymnosperm, the sporophyte is the dominant generation, and the gametophyte surrounds the sporophyte with tissues for nutrition. Also, the Gymnosperms seeds, or in this case cones! There are two different types of cones involved in the reproduction of the Virginia Pine. There are the ovulate cones, which are much bigger in size, contain the female gametophyte, and contain the embryo. The pollen cones are much smaller in size and contain the male gametophyte. The pollen is transferred to the ovules by pollination and wind is required for this to occur. Here is a diagram to fully explain the life cycle of the Virginia Pine.

1) There is a ovulate cone and a
    pollen cone
2) Microspores (give rise to male
   gametophytes) divide in meiosis,
   and produce a haploid microspore,
   which later develops into a pollen
   grain within the pollen cone
3) Each scale on the ovulate cone
    consists of two ovules with
    megasporangium (give rise to
    female gametophytes)
4) Pollination occurs when the
    pollen grain reaches the ovule.
    The pollen grain germinates and
    moves through the
    megasporangium
5) The megasporophyte goes through
    meiosis, and produces four
    haploid cells. Only one survives
    and becomes a megaspore
6) The female gametophyte forms
    inside of the megaspore, which
    has two or three archegonia that
    form into eggs
7) The eggs are mature and the
    sperm cells have developed in the
    pollen tube, which connects to
    the female gametophyte.
    Fertilization occurs and the

                                                                                         nuclei become one
8) Usually only one zygote develops into an embryo. The ovule becomes the seed which contains the embryo and supplies it with nutrients and protection through the seed coat.

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