get this, I was looking at it last night real close, and it looks like a buch of roots, or worms are coming out of the bottom of the stalk.
lets see if I can describe this.
the head of the leather kinda faces about 15 deg. from the water level. The stock or stump grows perpindicular with the water level, and makes an abrupt 80 deg turn into the rock it is attached. Basically it grows out of the side of a rock, then up. At the bend of the stump, there are about 8-12 white "stick, root, worm" looking things comeing out. they are about the size of an 07 mm pencil lead, and about 1/8 to 1/4 inch in length, perpindicular with the bottom of the tank.