Seed pod/flower Bloom. Can't say that I ever seen one of these before. I asked my FIL and my older woodsman friend and they never seen one either. I know someone on here will know.
I've seen that before, but i cannot tell you exactly what it is. I believe it's some kind of growth/fungus/bug something-or-other, not 'part' of the red oak it is growing on.... How do you like that very scientific and informative explanation?? Haha
We've found them on oak trees; fortunately not often. I don't remember what they are called but do know they hold some kind of bug eggs. I remember cutting one open but it has been years ago.