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 ...

The Hemlock whistles softly to itself.”–Naturalist and botanist Donald Culross Peattite Known as the state tree of Pennsylvania, the backbone of the nineteenth century hide-tanning industry, and a ...

The Hemlock Woolly Adelgid (HWA) is an aphid-like insect that feeds mainly upon Hemlock tree species. HWA was introduced into the eastern United States from Japan in 1951 by the import of infected ...