In Ratchet, there is a quest you can pick up if you are a herbalist called Root Samples. It tasks you to collect additional items when picking herbs in the Barrens zone and then hand them in. However the root samples you are supposed to collect do not appear on the herbs in the Barrens. They do spawn however in the herbs you can pick in Mulgore, which is the wrong zone.
Just replying to say this is still broken, though I did not know about the herbs in Mulgore.