When I'm grinding away in dungeons, I sometimes pick up these items shaped like mushrooms, labeled with a giant question mark and the name "Ingredient". These end up taking up a lot of space in my preciously small loot bag, and as far as I can tell I don't end up actually taking them back with me when the dungeon ends. My best guess is that these are items that I can't identify until either my Merchant or Adventurer level is high enough. Am I correct? Was this something explained in the tutorial that I kind of glossed over...? :(
What are these Ingredient items?