What is the adaptation for the diamond leaf willow?

The willow has tough roots which grow both underground and from aerial parts of the plant to obtain as much water as possible. They also have very thick scaly bark which offers protection from the elements and contains salicylic acid (a plant hormone), which is toxic in large amounts. Willow trees are able to take root from cuttings or fallen branches. This increases their abundance The willow has tough roots which grow both underground and from aerial parts of the plant to obtain as much water as possible. They also have very thick scaly bark which offers protection from the elements and contains salicylic acid (a plant hormone), which is toxic in large amounts. Willow trees are able to take root from cuttings or fallen branches. This increases their abundance