Tree pollen is the first type of pollen issue in the spring . In the south , tree diagram pollen can be released as early as January . In the far northern states , it is not unremarkably find in the air until June . Tree pollen can induce an allergic reaction in some people , but only 100 or so out of the 50,000 different types of trees create pollen that causes allergic reaction symptoms . Most pollen produced by trees does not have any effect on people .
Yellow Pollen
icteric pollen is a highly visible tree pollen . It can easily be come across on trees , and often rises in a cloud when a tree is shaken . Yellow pollen is make by evergreen trees , in the first place true pine Tree , include spruce , true cedar tree trees , fir Tree , larch and hemlock . Although yellow pollen face like it could cause an sensitized chemical reaction , in realness it does not trigger allergy symptom at all . It can stain the skin and clothing , however .
Sticky Pollen
yield tree make weighed down , sticky pollen that is not idle enough to easily become airborne . This pollen is formulated to stick to the bodies of insect so that when they gather nectar , they will fertilize the generative harmonium inside the prime . It does not create an hypersensitive reaction in people .
Hardwood Pollen
Deciduous trees ( those that unleash their leaves in the fall ) are the elementary producers of pollen in the United States . While the make-up of each type of pollen is unique , the pollen from these hardwood trees can cause an allergic reaction in many the great unwashed . Oaks are a common culprit , and so are elm , maple trees , birch tree tree , ash , hazel and alder tree trees . A somebody might be allergic to the pollen from just one of these trees , or to the pollen from several of them . The distaff version of some of these trees , include the facile maple and ash Tree , do not have pollen .
Cross-Reactive
Trees that produce cross - reactive pollen have pollen that is very similar to each other . If someone is allergic to the pollen from one of these trees , they will most likely be allergic to the pollen from the balance of the trees as well . Trees in this group let in sequoia ( redwoods ) , junipers , mountain cedarwood , and all cypress tree Tree .
Other Pollens
Some tree diagram have pollen that do not fall into one of the above three categories . Poplar and willow Sir Herbert Beerbohm Tree bring out a pollen that is very fine and does not cause allergies . Some decorative trees do not produce any pollen at all , as they are not fruiting trees and do not need to be fertilized .
