Yangben (Limbu) or Jhyau (Nepali) is a particular type of edible lichen, which is grown in branches of old khechingse (chestnut) or wasama (alder) trees as parasitic species. It is hard to harvest as it grows in tall trees mostly found in sloppy areas. It is generally consumed as dry curry. It is only found in the hilly regions of eastern Nepal- Taplejung, Panchthar, Phidim and Terathum, and consumed by Limbu and Rai ethnic communities. One can find it in Dharan to buy (although not easily available) and it is also exported to foreign countries. In Limbu communities, people give Yangben to their relatives as gift or Koseli.