You can see why it's called a "bloodwood" tree

"The bloodwood tree (Pterocarpus angolensis) is a deciduous, spreading and slightly flat-crowned tree with a high canopy. It reaches about 15 metres in height and has dark bark. The bloodwood grows in warm areas in the northeast of Africa, extending into Zimbabwe, northern Botswana, Mozambique and Namibia. The red sap is used traditionally as a dye and in some areas mixed with animal fat to make a cosmetic for faces and bodies."

Source, via The Soul is Bone.