Yew is an evergreen tree. People use the bark, branch tips, and needles to make medicine. Paclitaxel (Taxol), a prescription drug for the treatment of breast and ovarian cancer, originally came...

Taxus brevifolia, the Pacific yew or western yew, is a species of tree in the yew family Taxaceae native to the Pacific Northwest of North America. It is a small evergreen conifer, thriving in moisture and otherwise tending to take the form of a shrub.

2024年2月1日 · Yew tree bark is identified by its reddish-brown and distinctive appearance. Immature yews have identifiable smooth bark with mottled brown and gray shades. As yew trees mature, the bark develops deep vertical ridges and furrows. Pictures of yew bark show scaly bark that sometimes flakes off to reveal red patches.

The bark of T. brevifolia was found to have taxanes, a diterpene, which contains paclitaxel. This discovery was significant because paclitaxel has chemical properties that, when in the body of an animal, disrupt mitosis and acts as an antitumor treatment (Abal, 2003).

The bark of Pacific yew contains a drug, taxol, that is being used in cancer research, so demand for yew bark by the National Cancer Institute has increased dramatically in recent years (9).

English yew is an evergreen, conifer, conical-shaped, small tree or large shrub that reaches 30 to 60 feet in height. It has dense spreading branches with dark green linear needle-like leaves. The mature bark of the English yew is scaly and reddish-brown, and the trunks are very thick.

In particular, the dark-brown or purple bark of western yew has been found to contain relatively large concentrations of an alkaloid known as taxol. Taxol has been demonstrated as being an effective treatment against advanced cases of ovarian and breast cancer, two deadly diseases.

Yew is a densely branching, evergreen tree with a big trunk that can reach up to 20m tall. The bark is thin, scaly, and brown, it comes off in small flakes. Its leaves are dark green, leathery, and narrow with a pointed tip. Yew seeds grow at the tip of a dwarf shoot, enclosed in a red, fleshy, cup-like structure called an aril.

2023年11月16日 · A Yew tree is an evergreen conifer belonging to the genus Taxus. Known for its longevity, needle-like leaves, and red berries, the Yew tree has cultural, historical, and ecological significance. Where are Yew trees found? Yew trees are distributed globally, with different species found in Europe, Asia, North America, and other regions.

Mature yew trees can grow to 20m. The bark is reddish-brown with purple tones, and peeling. The yew is probably the most long-lived tree in northern Europe. Look out for: the needle-like leaves which grow in two rows along a twig. Underneath, the needles each have a raised central vein.