Yes I know it was mentioned during a recent event -the slight variance in green dungeons vs the pale green dungeons...
I just completed 10 - 15 runs of Whisper WOOD... yes wood for the mushroom & forest dungeon quest double up..
(used with a singular or plural verb) a large and thick collection of growing trees; a grove or forest:
and then realised this was not a forest dungeon..
Maybe I just can't see the forest for the trees.