In the
plant reproductive life cycle, reproductive tissues in a (typically)
diploid sporophyte individual undergo
meiosis, producing
haploid spores, which develop into
the haploid
gametophyte generation. Gametophytes are individual plants which produce
gametes.
In higher plants such as conifers and angiosperms, the gametophyte generation is very reduced in size. Pollen grains are the male gametophyte, and the female gametophyte is contained within ovules in flowers or cones. What we see as "the plant" is the sporophyte generation.