The tree, Cercis canadensis (or maybe C.siliquastrum- Judas tree) has wide annular rings but the end grain is very hard. A utility knife blade has as much trouble sinking into the end grain as red oak. The fingernail test feels like the wood is very dense. I've looked into dozens of FIREWOOD-BTU charts but don't see redbud or Judas tree listed. Has anyone burned this and how long to season and how good a burn? We don't have much of it, just curious how it does as firewood.