IU has almost 13,000 trees on campus, including 40 to 50 invasive bradford pears. This is the second year of a three-year ...

From beloved to banished, cities and states are outlawing cultivars of the Callery pear, a popular, yet highly invasive, ...

When early gardeners first brought tree of heaven to the United States, the country itself was less than a decade old. In the ...