Are there really organisms that can be several acres wide that use hallucinogens to lure prey?

The reasons this was on x-files is it is not true and a stretch of a possibility. There arn't any organisms I know of that are that large and lure prey with hallucinagins. I'm also pretty sure that there arn't any several acres wide, although many people thing some individual trees in a forest can share a root system with other trees, thus consider them one organism. I think your chances of finding something like this is pretty slim.