The drug, derived from the bark of the African bush willow tree, has been shown to work by ... toxic side effects,' said Dr Remick. However, used on its own combretastatin leaves an outer rim ...

This week, we meet Black willow or Salix nigra. The black willow is one of ... changing to yellow-green in the fall. The bark on young trees is smooth, but may be warty or feature some flaking. In old ...