As I said elsewhere on this site, or on a book, or in a fever dream - there's no way to describe this except "scalped, bleached Klingon skull."

Perhaps an albino brain that's been fed nothing but llquified Pat Boone recordings.

It's the scattered green that make you wonder whether the entire thing, placed in a shed, would sprout after a week, and later gain a strange animal sentience that wanted only to grow and consume.