Gum Tree, any tree that yields a sticky substance known as gum. The sour gum, also called tupelo, is common in the eastern United States. Other North American gum trees include the sweet gum and the eucalyptus, which was introduced into California from Australia. The sapodilla tree of southern Mexico and Central America is the source of a gum called chicle, which is used as the base for many types of chewing gum.
Pollen grains are, in essence, plant sperm. But how do the grains get where they need to go, and what's the advantage of trusting your genetic future to the winds?
Have you ever suspected your neighbor was up to something illegal? He's always home and he gets midnight deliveries. Doesn't he have a job? Maybe he does, just not the kind you think.