Pennsylvania's state tree is the eastern hemlock. Its scientific name is "Tsuga canadensis."The eastern hemlock was named the state tree in 1931.These trees are slow-growing and long-lived, taking 250 ...

Add Yahoo as a preferred source to see more of our stories on Google. Hemlock wooly adelgids - tiny insects that suck the life out of Eastern hemlocks - can be killed when the temperature drops below ...

A new study finds that creating physical gaps in the forest canopy give eastern hemlocks more access to resources and help those trees withstand infestation by an invasive insect. The approach adds ...

If you ever made friends with a tree, then you will understand why I wrote this. The Eastern hemlock became my friend when I was a child, playing on a forested slope behind the house that my dad built ...

The Pennsylvania legislature designated the eastern hemlock the official state tree on June 22, 1931.This tree thrives in cool, moist sites. It occupies steep north- or east-facing slopes in southern ...