Tree from the cinchona tree ("Cinchona") and was for a long time the remedy of choice for the treatment of malaria. Aspirin was synthesised to replace the sodium salicylate derived from the bark of willow trees ("Salix") which had unpleasant side effects. The anti-cancer drug Paclitaxel is derived from taxol, a substance found in the bark of the Pacific yew ("Taxus brevifolia"). Other tree based drugs come from the paw-paw ("Carica papaya"), the cassia ("Cassia spp."), the cocoa tree ("Theobroma cacao"), the tree of life ("Camptotheca acuminata") and the downy birch ("Betula pubescens"). The papery bark of the white birch tree
Parable of the Olive Tree the ground and nourished it. In time some new branches appeared, but the top of the tree began to perish. So the master of the vineyard instructed his servant to cut off the decayed branches, and replace them with grafts of wild olives. Meanwhile, natural branches of the tree were transplanted to other parts of the vineyard. In time the original tree, now with wild olive branches grafted onto it, grew to give good fruit. Those natural branches of the original tree that were transplanted into poor soil also grew to give good fruit. However, a natural branch of the