It’s become an increasingly common thing for me to see people confidently stating that severed heads are the Morrigan’s acorns or her acorn crop. Sometimes people do correctly identify the “crop” in question as belonging to Macha, but nonetheless keep on with the acorn part of it. In some cases, including some popular books, people get quite elaborate with this, adding in some poetic details or layering on deep spiritual significance.
Alright, well, let’s take a look at the actual material from the mythology, or to be precise the glossaries, because there is no mythic story of head taking or reference to such. So what do we actually have?