W EUCALYPTUS BRANCH, AUSTRALIA
Eucalyptus trees, also popularly known as Gum trees because some species exude a gum, are fragrant and normally pest-resistant. There are more than 400 species of these tender evergreen trees with smooth, lance-shaped leaves, which can grow to gigantic proportions; some reach heights of more than 400 feet in their native Australian habitats, and up to 200 feet when introduced into California.