Farmers: there are two Salving Cactuses which spawn right near the entrance to Heroes' Audience in approximately the same location - one a bit to the north and west, the other a ways to the east. Watch out for Sand Elementals - they are hostile to the cactuses and may end up killing them, precluding any chance of a dropped item.
Anomaly! Some Salving Cactuses act very oddly; they burrow into ground for 40 seconds and then re-burrow for 15 seconds over and over again. Unlike wurms, they can't move while burrowed.
Bug! If they use a skill at the time they should burrow, they will not burrow but they will not attack you for the next 40 seconds like if they would be burrowed, however they still use skills .
Bug! If they get knocked down while trying to burrow, they will still technically burrow but they'll be visible and normaly attackable to the player, however they won't be able to attack, move or use any skills for the next 40 seconds.