Common flora and trees that trigger allergic reactions.

Birch
If it’s spring and you’re sneezing, those timber might be part of the problem. They develop throughout the continental U.S., besides in the southernmost and westernmost states, and their pollen could be very likely to trigger allergies. They’re frequently planted in yards and other landscaping due to the fact humans like the manner they look -- the telltale white bark makes them easy to identify.

Elm

Cedar

Oak

Pine

Poplar

Walnut

Ragweed

Bermuda grass

Bluegrass

Nettle

Sagebrush

Tumbleweed

Lamb's quarters

English plantain