Once there was a willow tree on Penn State’s University Park campus that was an off-shoot of a willow tree that grew in Alexander Pope’s garden. It was a Salix babylonica “Pendula,” and it was brought ...

Question: Weeping willow, six years old and 9″ diameter. Wet, clay ground and thriving. Suddenly late last summer, I noticed the leaves were dead, and the bark on the trunk was completely loose and ...