Now that the game is released, this is a follow-up question to this question.
I wandered around and have found a lot of Nirnroots (they're pretty hard to miss) and they also don't seem to respawn. However, I haven't yet discovered a quest related to them like there was in Oblivion.
Do I have to talk to a specific NPC, read a book, or do something else in order to start the quest? Or is there simply none in this game?