At maturity, the pollen grains are released from the male cones and dispersed by air currents. At this time, a pollen grain has two prothallial cell, a generative cell and tube cell. They form yellow clouds in pine forests. A pollen grain has two air sacs or wings for making it light. Part of the upper surface of the ovuliferous scale is peeled off along with the seed to form its wing. A female cone takes 26 months for reaching maturity. It further opens to release winged seeds that are dispersed by air. After falling on suitable soil, each seed gives rise to a new plant.