Using the ISA magazine’s cover as our inspiration, ArborNote’s Tree of the Week is the Boab Tree (Adansonia gregorii). This odd but fabulous tree is endemic to the northern regions of Western Australia and the Northern Territory of Australia. It is the only baobab to occur in Australia, the others being native to Madagascar and mainland Africa and the Arabian Peninsula. is easily recognised by the swollen base of its trunk, which forms a massive caudex, giving the tree a bottle-like appearance. Boab ranges from 16–49 ft in height, usually 30–39 ft, with a broad bottle-shaped trunk, up to 16 ft min diameter. The tree’s bark has a remarkable property, in that it can maintain inscribed markings for long periods of time, over more than a century! The plant has a wide variety of uses; most parts are edible and it is the source of a number of materials. Aboriginal Australians obtained water from the tree, owing to its ability to store huge amounts of water; some of the oldest and largest trees can hold more than 100,000 L (22,000 imp gal; 26,000 US gal) of water in their trunks!