Also known as Gidgee, Boree, Myall, Deadfinish, Mulga, Brigalow. About 800 species grow in Australia. They are widespread in arid, semi-arid and sub-humid regions and have a distinctively different foliage to those of Africa and Asia. They vary from tall trees to prostate shrubs with great variation in leaf and seed shape, though are easily identified by their ball-like yellow flowers. The dark brown hardwood has a narrow band of yellow sapwood and is a hard and heavy timber that takes a high finish. The plants are important for shelter, shade, fodder and increasing soil fertility.