36 - sleeping potion - quicksilver (NPC purchasable), morbol vine (NPC purchasable in Limsa), belladonna (harvestable).
37 - silencing potion - same ingredients as the sleeping potion, but replace the belladonna with the harvestable tarantula.
41 - shark oil - both ingredients are fish.
43 - mega potion - water is purchasable, mistletoe and mugwort are both harvestable.
I was driving to work this morning, just zoning out, listening to my radio, and out of the corner of my eye, I saw a BLACK MAGE TARU HEALING ON THE SIDE OF THE ROAD! For one split second, I thought "Omg he needs to get out of there he's gonna aggro... what a noob."
Then, I realised it was a black garbage bag left out for pick up.