What other allergic reaction to trees are there? Here are some ones I know about.

1. Sycamore trees. There is a dust on the underside of the leaves that can be a respiratory irritant in the spring. It manifests is a hacking cough that no water can put out. People have been known to die from extreme cases. A dust mask is the most simple solution and seasonal climbing of the tree seems to be a way to deal with this tree.

2. Black walnut trees. Here’s one I am allergic to. The leaves make be break out like poison ivy. These trees have a toxin as well, as known by the Native Americans who would pulverize the hulls and toss them into streams thus killing fish that would float to the top for collection. The hulls will also thwart any kind of plant survival other than the black walnut species.

3. White oak pollen. Here’s a new one for me. This tree’s pollen is rated number 3 for asthma sufferers. It’s somewhere about 23% for cause of this illness. I read this in Consumer Reports health newsletter. No other oaks were mentioned. Anyone know this?

I know the tropics have some really nasty trees that cause reactions. Let’s stick to the temperate forests for now. Who knows anything?