Pennsylvania naturalists are keeping an eye on a disease that has been killing beech trees in the eastern U.S. for more than a decade, but has begun spreading more rapidly in the past three years.

The Liberty Tree sapling commemorating America's coming 250th anniversary, planted in Central Park in May but failing to thrive, will be replaced, Honesdale Councilor James Hamill said at the July 22 ...

She said the problem is microscopic worms called nematodes are eating the trees, which can cause the trees to die rapidly. According to the state, the first infected tree was found in Plymouth County ...

Three saplings grown from the illegally felled Sycamore Gap tree are being planted in Derbyshire. One of the saplings has already been planted at Swanwick School and Sports College and two others are ...