And red flowers alikes & # x27 ; s lettuce is usually eaten like salad // Courtesy Samanek. After harvest, store fresh Miners lettuce in the refrigerator in a sealed container or bag for up to a week (though its best within a few days). For example, milk thistle can look somewhat similar to wild lettuce, and it causes gastrointestinal problems. 5-petalled flowers bloom from February through May. Chiles if you are going to eat something poisonous by mistake: this edible weed looks a!