Spore of the polypore

It started out small...

While we were checking on our recently found orange fruiting bodies, we also stopped by to visit our previous find the polyppore. On one occasion we noticed that adjacent to the polypore a new

...and grew into an impressive mass

fruitbody was forming.  It started out small, but as the days went by we watched it grow into an impressive mass.  At the same time, we observed the polypore slowly darken and die.  At first, we assumed, naturally, that spore from the polypore had spawn this new creation. However, as time went by, and the new fruitbody grew, it became clear this was not spore of the same polypore but rather a species of its own.  Its multitude of intricate lobes liken it to a cauliflower mushroom.

...while the polypore darkened and died