Not a tree is to be seen, the few woods and thickets being hidden in the depressions and deep valleys of the rivers.
Farther from the rivers are open woods of heglig (Balanites aegyptiaca), hashab, &c., and dense thickets of laot (Acacia nubica) and kittr (Acacia mellifera).
Much of the country, especially round the Gulf of Tolo, is covered with primeval forests and thickets, traversed by scarcely perceptible paths, or broken with a few clearings and villages.
Thickets and small acacias dot the steppes, which, green during the kharif or rainy season, at other times present a dull brown burnt-up aspect.
Drainage finding no outlet through the thick clay, the soil of the forest region is often hidden beneath extensive marshes, and the forests themselves are often mere thickets choking marshy ground; large tracts of sand appear in the W., and the admixture of boulders with the clay in the N.W.