Narthecium ossifragum, commonly known as bog asphodel, Lancashire asphodel or bastard asphodel, is a plant of Western Europe, found on wet, boggy moorlands up to about 1000 m in elevation. It produces spikes of bright yellow flowers in summer. The bright orange fruits have been used as a colourant to replace saffron by Shetland Islanders. Despite the plant's English name, it is not particularly closely related to the true asphodels. It can be found in purple moor grass and rush pastures. It is tufted, hairless perennial. The leaves are narrow.