Haha, no, there wasn't any weed left. I am sure that there probably are some other plants growing all around there but I don't smoke it anyhow.
Witches Butter is just a crazy mushroom. It's edible, doesn't have much flavor, and has the consistency of a bright orange loogie.
I hope the weather lets up soon, I will be going back to LA tonight or tomorrow, but hopefully when the sun comes out you will be able to explore the nature up there.