Pretty little plant with an incredible, vine-like
root
structure. The roots go
all over the damn place, so
if you pull up one little plant here or there
you have
done nothing because it will just shoot up someplace
else, and all the time there is a huge
taproot somewhere
under there just
laughing at you and your efforts.
It has three leaves, looks something like a small oak
tree, but can change all sorts of beautiful shades of
red, green, and orange.
If you touch it, or touch something that touched it,
you will get little blisters on you a day or two later.
They itch like hell. Hot soapy showers make it spread.
The blisters get weepy and yucky and it takes forever
for it to go away. If you get it on your clothes,
especially your shoes or gloves (i.e., things you don't
wash much), you can get the damn thing all over again
every time you put your shoes on.
You can also get it from the smoke if you burn it.
Oddly enough, it only affects human beings. So your
dog can run through it, not get it himself, but give
you a major case of it.
Might feature in an argument for the existence of God, since it
is an anthropocentric phenomenon, or maybe the existence
of various gods with differing feelings toward humans.