Originally Posted by Hoborg
That's nice but I doubt looting reagents counts.
It doesn't. I clarified the original post so maybe it's more obvious now. The places listed are where they grow. You have to actually harvest them from a plant.
When you loot them it messes up your count, so you have to make a list to keep track of what you've harvested.
Edit: Multiple people have reported it may count for Essence of Fate so who knows if it counts for the others. I got the achievement harvesting from plants so I know that works.