Eucalyptus trees are tall, evergreen trees native to Australia and nearby islands. They belong to the genus Eucalyptus and are known for their aromatic leaves, which contain essential oils. These trees can grow rapidly and are often used for timber, paper production, and as ornamental plants in gardens. Eucalyptus trees thrive in a variety of climates, particularly in warm, dry areas. They have a unique bark that can be smooth or rough, depending on the species. Many types of eucalyptus are also important for wildlife, providing habitat and food for animals like koalas.