cage of bones...? I think you mean the crumbled inn. Other than that, don't bother with any bones.

as for the flower...go to the left side of the screen, until you hit the wall. continue up and down that side until you see the flower. I'm sure you won't miss it, 'cause it strange and exotic. use holy on it. it's actually on the wall. not in the sand a little bit away from the wall.

now watch as the flower becomes the pedestal where you put the myrrh container and change it's element.