Oaks are broad-leaf deciduous trees that can live for over 200 years.
In fact, there is a tree in Mandeville, Louisiana, that is believed to be more than 1,000 years of age! These statuesque trees can grow 100 feet tall with 4-foot-wide trunks. North American oaks can generally be divided into two groups: white and red oaks. All other types of oaks fall within these two species.
Oak Tree Pollen
Male and female flowers on an oak tree are situated on different parts of a branch. It is the male flower that contains the oak pollen. Male flowers, or catkins, look like long worms hanging from the oak tree during spring. After the stamens release pollen into the air, the catkins fall to the ground. The pollen hangs mist-like in the air before descending onto the female flowers and fertilizing them. Oak trees use the wind to pollinate the female flowers.
Oak tree pollen adversely affects a large number of allergy sufferers. This is because the tiny grains are carried on the wind and irritate sensitive mucous membranes. Oak pollen season can start as early as February and can run through the end of June.