Narthecium ossifragum, commonly known as bog asphodel, is a wetland plant species found in the moors, bogs, and heaths of Northern Europe. The plant is characterized by its bright yellow, star-shaped flowers and sharp-pointed, grass-like leaves. There are several synonyms for this species, including Narthecium angustifolium, Narthecium californicum, and Narthecium flexuosum. Other common names for the plant include bone-breaker, yellow asphodel, and bog lily. The plant has been used in traditional medicine for its supposed healing properties, and it was even believed to be able to dissolve bones, thus leading to the name "bone-breaker". However, the plant should not be consumed as it can be toxic.