[Wikipedia] Australia native: Eucalyptus camaldulensis, commonly known as the river red gum,[3] is a species of flowering plant in the family Myrtaceae, and is endemic to Australia. It is a tree with smooth white or cream-coloured bark, lance-shaped or curved adult leaves, flower buds in groups of seven or nine, white flowers and hemispherical fruit with the valves extending beyond the rim. A familiar and iconic tree, it is seen along many watercourses across inland Australia, providing shade in the extreme temperatures of central Australia. (contributed by Mary Ann Machi)

[Wikipedia] Status as weed: The global weed compendium lists E. camaldulensis as a weed in Portugal, Canary Islands, South Africa, Spain, Bangladesh, the United States, Ecuador, the Galapagos and other countries. The species, while native to parts of Western Australia, has become naturalised via garden escapees and introduction as a restoration plant; they are the subject of weed management programs.Its ability to tolerate drought and soil salinity, together with its prolific seed production, and capacity to reproduce when very young, mean that it is highly adaptable, and it has been declared invasive in South Africa, California, Jamaica, Spain, and Hawaii. (contributed by Mary Ann Machi)