but of course, the illegal Cannabis plant would not be good as a "culture," even though it already is, basically.
I'd say cannabis is definitely rooted firmly in our culture (UK and US cannabis culture is very similar). It might not be legal but that doesn't stop millions of users across the country toking up and loving it. Anti-weed ad campaigns and the like just fuel the fire. It has been, and always will be a method of personal expression, a rebellious retaliation to a system widely accepted to be flawed and deluded.

Don't you see man, cannabis culture is huge. Do we have head shops for alcohol?