[Wikipedia] Australia Native: Eucalyptus globulus, commonly known as southern blue gum or blue gum, is a species of flowering plant in the family Myrtaceae. It is a tall, evergreen tree endemic to southeastern Australia. (link added by Mary Ann Machi)

[Cal-IPC] Invasiveness: Eucalyptus globulus (Tasmanian blue gum) is a tree (family Myrtaceae) found throughout California, but has primarily escaped to become invasive along the coast. It has effects on fire danger, native plants, and wildlife. (link added by Mary Ann Machi)