I rolled over a couple of these and they had what i *think* was a generic label ('dark patch underground' or something). So sorry but in the frenzy of play, I did not take a screen shot or note in which cave I saw this. The funny label was on a couple of patches a patch which did not need tending, an all-dark one.
It has also occured to me that this could be game humour, but it wasn't up to your usual wit ;)