It's important to remember that it's not the plants with big showy flowers that cause your allergies to flare up. Plants with large grains of pollen, like flowers, are insect-pollinated. Plants that rely on airborne pollination, like oak trees, have small grains of pollen that will aggravate allergies. Oaks bear fruit -- acorns -- that take up to a year and a half to mature. Oaks are highly prized for their lumber.
Oak tree facts:
- Appearance: Oak trees are large, rounded trees. There are more than 600 species of oak trees in the world, and they come in all sizes. An oak tree has green (sometimes bluish) leaves with rounded lobes. The flowers are called catkins, and those are what release the vast amounts of pollen.
- Peak time:Oaks flower in the spring.
- Location: You'll often see oak trees in the woods. Oaks are common in the Atlantic coastal plain, from Texas to Virginia, as well as Florida.