It is a shrub tree branching out at the tree base. It doesn’t have root-knot. The roots are black. The bark is gray-brown crest. The trunk is about 5-8 meters high containing curved spines around. The leaf type is bipinnately compound leaf. It is classified as a medium-sized perennial plant or a shrub tree.
When compounding the heartwood of Sappan tree into herbal medicine, it affects nourishing blood, helps to drive menstruation, relieve diarrhea, expectorate, treat of Aphthous Stomatitis and relieve anal and urinary bleeding. In addition, it has the effect of relieving the bleeding of various organs as well, such as bleeding in the intestines and stomach, nosebleed, etc.
Reference : https://medthai.com/ฝาง/