botanic bush floral flower flowering flowers food green herb herbs marjoram nature plant plants spice summer culinary flavour garden kitchen leaf leaves medicinal natural oregano Origanum majorana taste edible England Great Britain Origanum vulgare South Downs Sussex wild animal arthropod diptera feed fly hoverfly insect invertebrate rest english farm fence field national park post antenna blue butterfly common delicate feeding female fragile Lepidoptera Origanum peace Polyommatus icarus proboscis rhopalocera spot spotted Surrey wing