Trees most likely to cause symptoms include birch (Betula), catawba (Catalba), cypress (Cupressus), elm (Ulmus), hickory/pecan (Carya), oak (Quercus), sycamore ... will also help to nip your symptoms ...

Shagbark hickory (Carya ovata) is, as its name suggests ... To identify the tree in winter, look for its bright yellow buds.