The IBTR, which was started in 1962, only recognizes 184 native tree species found in Illinois. That means such common trees as Osage orange, a non-native, are not included. Nor is American holly ...

They were also pest-resistant and disease-free. Today, these trees are known to be an invasive species, growing rapidly and ...

The invasive beetle is the main reason why Illinois does not allow firewood to be transported more than 50 miles. “Our native ash trees have zero ability to resist them and so what we’re ...