Navelwort is a succulent perennial herb known botanically as Umbilicus rupestris, a member of the Crassulaceae family native to western and southern Europe. It has rounded fleshy leaves with a central depression, grows on stone walls and rocky banks, and the leaves and fresh sap are the parts most often mentioned in traditional use.
In folk herbal traditions, navelwort was associated mainly with external applications rather than formal internal use. It has long been regarded as a curious wall-growing plant with cooling, moist leaves.
Because navelwort is a folk herb with a narrower traditional range, it is more often noted in regional plant lore than in major commercial herbal practice.
