Boab trees (Adansonia gregorii ) are distinctive features of the Kimberley region of Western Australia (left). They are also found in northwest Northern Territory. The immense, swollen trunks on older trees can measure over 15 metres around. Radio-carbon dating of a related species in Africa indicated an age of 1000 years. Given their slow growth rate and the immense size of some trunks, large Australian boabs are also likely to be very old. The large white flowers, which are pollinated by hawkmoths, appear on the spreading branches of the tree when it has dropped its leaves. The name boab is a shortened version of the African 'baobab'.
Boabs are a puzzle. In spite of their trunk shapes, they are not related to Australian 'bottle trees' (Brachychiton sp.).
A lot of people actually have boab trees planted in their gardens around the Perth area of Western Australia, or at least those with a few acres. They are not natives of the area but adopt very well.
http://www.savanna.org.au/all/softwoods.html
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