Here's a wild lettuce with a much more compact inflorescence. Wild lettuce variations go beyond its appearance. In various times and places it has been eaten, and used as an analgesic, anodyne, antispasmodic, digestive, diuretic, hypnotic, narcotic, sedative, or to treat poison ivy and warts. The sticky white sap was collected much like poppy sap, and does have mild but genuine narcotic properties. It's not habit forming, but in sufficient quantity can kill you. It's pretty bitter, so ingesting that much is pretty unimaginable.