Hi Paul the only blank I had of this tree reminded me of Cedar light in weight shiny reflective like blackwood lovely to work with I have heard it called the five o,clock tree cause the leaves fold up that time in the afternoon, the leaves are Mimosa like related to Inga that is a Mimosa or sensitive plant.The tree secretes from the canopy hence the name one of at least fifty Rain Tree.
Your pens do vary somewhat but a lovely brown colouring I go with the top pen for beaut swirling colour.
Kind regards Peter.