How many species of hardwood are there?

There are approximately 90 different species of hardwood trees, ranging across various genera and families. Some of the most common hardwood species include oak, maple, cherry, and walnut. The total number of hardwood species can vary due to ongoing taxonomic research and discovery, as well as regional differences in biodiversity. However, hardwoods are primarily classified based on their broad leaves and are found in various ecosystems around the world.