Hi there,
Its so hard to tell from pics but to my eye that wood looks like it still has bark and just doesn't have the normal "dried out" look. Its important that (driftwood, bogwood, mopani) be completely dried out as you don't want young wood that still has sap and other organics leaching out I believe.
But again, its hard to tell, could be completely dry and just need the bark to come off. (that's another worry, come to think of it, that the bark will break down and float all over your tank, clogging your mechanical media.)
~~waterdrop~~