Original: of those, the parasitic mistletoe habit has evolved independently five times: Misodendraceae, Loranthaceae, and Santalaceae, including the former separate families Eremolepidaceae and Viscaceae.
Simplified: E. Cobham Brewer, Dictionary of Phrase and Fable 1898, s.v. "Kissing under the mistletoe" relates the custom to the death of Balder, without authority.