Pterocarpus or Kosso Rosewood is a pantropical genus of trees in the family Fabaceae. Timber values for its toughness, stability in use, and decorativeness, most having a reddish wood. Most Pterocarpus woods contain either water- or alcohol-soluble substances and can be good for dyes. Right after cutting it has a very bright red/orange color but after exposing to sunlight fades over time to a warm brown.
Its color makes it a favorite among woodworkers. People often confuse this type of timber with true Rosewood to which they are somewhat related but as a general rule, Pterocarpus is coarser and less decorative in the figure. Like Rosewood, padauk is good to make xylophone and marimba keys and guitars. It is an important material in traditional Chinese furniture.