Greg Malone, the plant science program director, told me the weird objects were the fruit of the Osage orange tree. There isn't a nut inside, just a fleshy center and tiny seeds, he said.

yellow, and orange. Some tree species can express several of these colors simultaneously as the season progresses. All leaves start out in summer as green. This is because of the presence of a ...

This season, leaf peepers will see shades of red, purple, orange ... Ever wondered why all of the aspen trees shift from bright green to a bright golden yellow? Like any color palette, leaf ...