Scientists say there are more than 60,000 tree species worldwide. When it comes it identifying a species, there are many different characteristics that can be used — from its leaves to where it is ...

Tree-of-heaven leaflets have what we call “glandular teeth” (See Figure 2) at the base of an otherwise nearly smooth or entire leaf margin. Tree-of-heaven will have a single terminal leaflet, while ...

The sycamore tree is one of the most recognizable giants of nature. From its peeling bark to its broad leaves, it carries ...