If I'm not mistaking, there was a time that the mistletoe that we used to pick for our holiday cheer was once so over collected that it became scarce and then artificial flowers became popular and so there was no more profit to be made. There are many species of mistletoe, about 1300 world wide. The last I heard about the state of mistletoe was that it is considered an endangered species in NJ, USA, and can not be gathered except when it is on your private property. I don't know about other states.
The tradition is to shoot it out of trees with a shot gun. That may be another reason why it has become scarce.
Hope this is just enough info for you. Mistletoe is a very interesting plant. Many animals eat it and nest in it when the plants become big enough.
peace