Nysa is a genus of flowering plants belonging to the family Nyssaceae. These trees are primarily found in temperate and subtropical regions of the Northern Hemisphere. They are known for their attractive foliage and can grow in various soil types, often thriving in wet or swampy areas. The most well-known species within this genus is Nyssa sylvatica, commonly called the black gum or tupelo. This tree is valued for its beautiful fall color and is often used in landscaping. Nysa trees also provide habitat and food for various wildlife, contributing to their ecological importance.