the "Argus Tree".
[Argus Panoptes ("Argus, the all-eyes") was a giant with many eyes (a hundred of them, in some versions) in Greek mythology; he was the ideal guard, able to see in all directions and only some of the eyes closing to sleep at any time; however, after he was set to watch Io, one of philandering Zeus' many loves (disguised by Zeus as a heifer), by a jealous Hera, Zeus sent Hermes to lull him to sleep with a long boring story (or a sweet song, depending on who you read), and once all of Argus' eyes closed, Hermes hacked off his head]
Related post: "I've Got More Eyes Than You--"
