Shape of Acacia locust trees

Another recommendation of this tree, is the variety of picturesque shapes which it assumes in growing up; sometimes forming a tall pyramidal head of 50 or 60 feet, sometimes a low horizontally branched tree, and at others it expands into a wide irregular head, quite flattened at the summit. It does not produce suckers like the locust, and may therefore be introduced into any part of the grounds. When but a limited extent is devoted to a lawn or garden, this tree should be among the first to obtain a place; as one or two Three-thorned Acacias, mingled with other larger and heavier foliage, will at once produce a charming variety.