I think this thread most fits in this category but if it better fits a another Mods please move it.
I looked around a bit for a site that has good quality pics/info on domestic hardwoods.
Well this site has domestics as well as exotic and TONS of info related to the species of wood you are looking at. Very helpful.
I have no affiliation but thought I could pass it on here in case some of you had some mystery wood....