According to the Romans, nothing got the ancient Druids more excited than an opportunity to cut mistletoe out of an oak. On the whole, mistletoe does not grow on oak. I may have seen some once in about twenty years of keeping an eye out for it, and I didn’t have a camera, and it was winter so there were no leaves on the tree and I couldn’t get close enough to the tree to be entirely certain. In some ways that feels like a very workable metaphor for any kind of spiritual experience!
Mistletoe grows on all sorts of trees. In the area I live in, I’ve seen it on willows, and other trees, but the absolute favourite seems to be the apple. In the fat floodplain of the Severn, there are a lot of surviving old orchards, and a lot of non-fruit trees absolutely smothered in mistletoe at this time of year. Old apple trees have a bumpy bark, which of course gives the seed somewhere to lodge. Apple trees are attractive to birds, and birds are how mistletoe seeds generally find their way into tree bark, as birds clean their beaks. So it all makes plenty of sense.
One of the surprising mistletoe things I’ve recently learned is that, for reasons best known to itself, mistletoe does not like pear trees. I was in an old Severn-side orchard recently where all of the apple trees were covered in ‘the golden bough’ (which is of course green and alive, not golden and dead at the moment). There was one pear tree, and the pear tree had no mistletoe. The landowner was able to confirm that this is a thing.
Too much mistletoe does a tree no good at all, so taking from a well covered tree is in many ways a good thing. The mistletoe itself does not benefit from killing its host. If there isn’t a lot of mistletoe, make sure you leave plenty behind, or you’ll kill it. Resist the temptation to cut off a whole ball, unless there are a lot of other balls on the tree – generally taking no more than a third of anything is a good idea, and less if something is generally scarce.
Mistletoe Image taken from the Woodland trust website, which has an excellent page with lots of mistletoe information and more photos on it – https://www.woodlandtrust.org.uk/visiting-woods/trees-woods-and-wildlife/plants-and-fungi/woodland-wildflowers/mistletoe/