The term 'Tree in the Birch Family' can be summarized as an ALDER, which is a 5-letter tree that belongs to the Betulaceae family. ALDER trees are native to temperate and subtropical regions of the Northern Hemisphere, and they are often found near streams, rivers, and wetlands. They are deciduous trees that can grow up to 30 meters tall and have smooth, gray bark. ALDER wood is used for a variety of purposes, including furniture, flooring, and smoking food.