While hemlock bark has wonderful anatomical characteristics, the most valuable component is found within the bark: large content of tannins. For this reason alone, Eastern hemlock trees were the most ...

The Northeast’s hemlock trees face extinction. ... Hundreds of thousands of elms are being taken out by the Dutch elm disease, spread by the voracious elm bark beetle.

Green bark is found on trees and shrubs of many different, unrelated species. In Australia, young bottle trees of Queensland forest and scrubland have green bark that turns dark with age.

Second of two parts. Read part one here. Bark is a tree’s skin. Its main job is to keep out bacterial and fungal infections and wood-eating insects. Last week I wrote about the many ways tree… ...

HUDSON, N.Y. — Earlier this year, an ailing 140-year-old hemlock tree died at Olana State Historic Site, the idyllic former estate of Frederic Edwin Church, a leading figure of the 19th-century ...

The bark of this tree is certainly easily recognized. It starts out quite smooth on young twigs, but as the branches grow, the bark begins to peel and crack, thus exfoliating.

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 to 300 years to reach maturity.

It’s not just hemlocks that are threatened. Beech trees that are at risk from beech bark disease and oaks that are dying from oak wilt also are part of the adopt-a -tree effort.