Pacific Yew (Taxus brevifolia)
Source: Wikipedia http://commons.wikimedia.org/wiki/File:Taxus_brevifolia_Blue_Mts_WA.jpg
Caption: Under the current USPTO Guidance, the chemotherapeutic compound paclitaxel, currently produced using a plant cell fermentation technique, would not be considered patentable. Paclitaxel is a natural product produced by a fungal endophyte of the Pacific yew tree (Taxus brevifolia).