Asafoetida Oleoresin has a characteristic aromatic order and bitter acidic taste. It is actually a gum oleoresin from the various plants of ferula varieties. Asafoetida oleoresin is used in diluted form. The pure resin is very strong and with disagreeable odour. Asafoetida (/�¦s�?�?f�?t�ªd�?/; also spelled asafetida) is the dried latex (gum oleoresin) exuded from the rhizome or tap root of several species of Ferula, perennial herbs growing 1 to 1.5 m (3 to 5 ft) tall. They are part of the celery family, Umbelliferae. Asafoetida is an oleo-gum-resin obtained from the exudates of the roots of the Iranian endemic medicinal plant, F. asafoetida. It is used widely all over the world as a flavoring spice in a variety of foods.