Flower for the night crowd: GREAT BLUE LOBELIA (lobelia siphilitica). A wetland plant, its blue flowers make it fairly unusual among fall wildflowers, most of which are yellow or orange. This is another flower beloved by long-tongued bees, but all its parts are poisonous if eaten by mammals. Which brings me back to its scientific name ^, given because it was thought to be a cure for syphilis. Can't have syphilis if you've already pooped yourself to death!!