African birch (Anogeissus leiocarpa)

The leaves of Anogeissus leiocarpa are rich in tannin: they contain ellagic, gallic and gentisic acids, derivatives of gallic and ellagic acid, and several flavonoids (derivatives of quercetin and kaempferol) that are very useful for dyeing (Andary et al., 2005) but that may have deleterious effects on nutritive value. However, no signs of toxicity were observed in growing goats fed African birch browse (Yahaya et al., 2000).