http://www.xavier.edu/green/flora/taxus

Yew: evergreen conifer with flat single needles that spiral around the branch, but the needles twist to appear to form two rows.  The cones in a berry-like structure called an aril, that contains a single seed.  Some yews are thousands of years old.  The Pacific yew is the source for Taxol, used to treat breast cancer.  Yews were used for longbows in medieval Wales and England.