Notes from the Apothecary: Willow   Willows are a type of tree in the family Salicaceae. They’re deciduous, meaning they lose their leaves towards winter, and they love both moisture and sunlight. Striking weeping willows are often seen trailing their leaves across the surface of streams, while fluffy goat willow or pussy willow brightens up the spring with its soft catkins. While only the largest of gardens will enjoy a willow tree of their own, many people will have a green area or park they can visit to find one of the many species of willow which grow all across the northern hemisphere. Find your own favourite willow creek or…