blair duncanson

Firstly, must say that i do not hold as much scientific tree knowledge that several of you hold, so this is just an idea with no solid founds.
With ref to mistletoe.
Perhaps due to wet, smooth bark the deposited mistletoe seeds slid to the underside of the branches, germination of seed occured followed by the attack. Healthy tree responded to intrusion and continued to do so over the following years. Perhaps tree eventually won the battle and killed off the mistletoe in certain areas of the tree, (or mistletoe has a natural lifespan, that it had reached). Hence left with these bizzare growths on the underside of the trees limbs????
Grafts,
If tree was felled, would it be possible to wedge these grafts apart, what i mean is, is it true graft, cambium to cambium or is it healthy callusing due to external damage, ie rubbing branches??
Through experience of cutting through such,'grafts', i have found the callus wood to be much stronger than rest of timber found on the stem.
Be interested to see results if you ever get the chance to disect any of those growths. Seen them on a much smaller scale on a Nothafagus which naturally layered its lower branches, to enable spreading and i suppose some form of anchoring.
Interesting