What is "brachystegia"

Brachystegia is a genus of tree of the sub-family Caesalpinioideae that is native to tropical Africa. Trees of the genus are commonly known as Miombo, and are dominant in the Miombo woodlands of central and southern Africa. Hybridisation between the species occurs and taxa show considerable variation in leaflet size, shape and number, making identification difficult. New leaves show a great range of red colours when immature, later turning to various shades of green.