is a lichen
of the genus Umbilicaria
that grows on rocks. It can be found throughout northern
parts of North America
such as New England
and the Rocky Mountains
. It is edible when properly prepared and has been used as a food source in extreme cases when other food sources were unavailable, such as by early American northern explorers.
It is commonly used as a food in Korean cuisine (석이버섯) and used in Japanese (岩茸) and Chinese cuisine and traditional medicines (石耳) as a restorative.
- Edible plants