araceae arum flower lilies nature petal pollen spathes stamen white yellow zantedeschia alien foreign garden escape green invader Lysichiton americanus plant skunk cabbage spadix spathe Swamp lantern adão Aglaonema background bush evergreen garden houseplant leaf Monstera deliciosa peace planting texture tree vegetation water yard bad cabbage creepy England Lysichiton malodorous odd pungent skunk smelly spike stink strange Sussex unusual weird leaves anthuriums climbers color coloration colorful colour colourful cultivars cylindrical-spike decorative distinctive epiphytes exotic flamingo-flower flamingo-lily fleshy-spike flora flowerheads flowers glossy herbaceous humidity-loving hybrids inflorescence laceleaf modified-leaf painted-tongue perennials poisonous red shapes shield-shaped shiny smooth species surface surfaces surfacing tail-flower textures toxic toxicity tropical waxy