I always thought red gum(eucalyptus) might make a nice bow. I just haven't been able to get any with straight enough grain. It used to be a common hardwood available at nearly any Australian hardware store for building, not so long ago. Now all you can get is treated pine, or merbau.
Nasr, its hard to tell from your photo's what sort of red gum is there because you can only see the end grain, which could be painted with a dark paint. I know that in the US red gum is the heartwood of the liquidamber tree. Its a very different wood to Korey's Australian red gum. Self bows have been made from US red gum, with wide flat limbs, basic flatbows. A so so wood from memory.
Australian cypress is another wood listed, so maybe the red gum is also from Australia. I have also seen decent bows made from Australian cypress, backed with hickory. Its a very knotty timber, and can be hard to find a decent piece for a bow.