Upon arriving at the grave site, you realize that the ghost of the deceased is present. Better speak to her and see what she needs in order to find peace.
Get the sapling of a silverleaf tree and the tusk
Yes, that's the place I chose for my final rest. Thank you for taking my ashes here. But I can't find peace until this place has been marked as my resting place. I want a silverleaf tree to be planted here. And I would like to have the tusk of a crystal boar placed on my grave as a warning. Please help me so my soul can rest in peace. Bring me the sapling of a silverleaf tree and a crystal boar's tusk.
That should make a fitting memorial. You can find the sapling to the west.
Now that you have the sapling, turn north. Continue until you find a suitable boar.
Now return to where you scattered the ashes.
This quest is complete.