Yep, Mulberry. I have never worked with it yet, but I have two staves drying right now that I cut around Xmas. Been reading up on it a bunch, and discussing it with others. Seems it is a good candidate for a sap wood back or a hard wood back. I'm thinking I will make both and judge for myself. 10%-20% wider than Osage seems to be the consensus. Some are real proponents of it's bow properties!