Board Thread:Lore Discussion/@comment-72.77.73.35-20140403144840/@comment-4705438-20140405092726

Hist trees aren't normal trees. They're older then the world itself, nobody knows what their origin is. Even in one of the latest novels, about the time, when Nirn got destroyed, Hist remained a mystery to even the various deities.

They're sentient beings with a collective... hive mind. They're gods. Argonians revere and care for them with a reason.

Of course Argonians didn't come from physical trees, they are Black Marsh native lesser creatures morphed into a form (or various forms) that serve the Hist interests best.