The fringed Opium Poppy (Papaver somniferum} in the garden was trying to protect its pollen from the rain.  Although they are associated with drug addiction, Opium Poppies have been grown for thousands of years as a food and were once widely cultivated in parts of Britain so those found in the wild now are either the seeds from remnants of old crops or garden escapes.  Today the seeds are baked into bread and cakes or crushed for oil which is used for cooking, burning in lamps and used in the manufacture of paint, varnish and soap and have also been used in fireworks to create tiny sparks which scatter in all directions.  Their seeds are not narcotic as the poppy used for producing opium and its derivatives of heroine and morphine are a different variety so like many other gardeners I am not growing these illegally.