So what gives? Is the locust an aggressive outsider, or a longtime local? The answer is far from clear. In fact, the U.S.

The coming of autumn often makes trees harder to identify — but sometimes, it does the opposite. The black locust (Robinia pseudoacacia) is a case in point. In summer, its bluish-green, oval-shaped, ...

Don't miss the big stories. Like us on Facebook. The coming of autumn often makes trees harder to identify – but sometimes, it does the opposite. The black locust (Robinia pseudoacacia) is a case in ...

If plants were capable of expressing emotions similar to humans, area mesquite trees might literally turn green with envy and become jealous of another area leguminous tree species. This inhabitant of ...