I found this mushroom-shaped thing on a beach in New Zealand. I have no idea what it is; the stem is crazy long.
It seems petrified. But apparently polypores can be super hard, so maybe that's what it is. But the stem seems much too long for a polypore.
Or maybe it's a bolete? Still, the long-stem seems unlikely.
I also found a short-stemmed (or broken-stemmed) similar item on the same beach. I posted pictures of it in a different fossil id post.
Thank you for any pointers.