: Secondary electron image of a. human hair with a nanowire loop sitting on it. The diameter of the nanowire is equivalent to. the scale in the shale picture to the left. The. hair is about 60,000 nanometers in diameter.
Allergies come in different forms, so not everyone who has a pollen allergy is allergic to tree pollen. A palm tree allergy is indicative of your bodyâs reduced immunity to pollen, which can sometimes be genetic. When your body comes into contact with tree pollen, it releases histamine, the aggravator of common allergy symptoms. There are certain types of palm trees that donât exhibit pollen, such as Phoenix palms, so it is always important to identify the differences before planting any new trees in your yard.
Palm Tree. Palms are evergreen, mostly tropical plant in the family Palmae (also known as Arecaceae). There are over 2500 species of palms. Most Palm are tree-like, with single trunks and either fan shaped (palmate) or feather shaped (pinnate) compound leaves. The larger palm tree makes a dramatic statements in USDA Zone 8-10 landscapes, and a smaller palms are grown in containers everywhere.