The Probert Encyclopaedia of Nature

FERULA

Ferula is a genus of umbelliferous plants, whose species often yield a powerful stimulating gum resin, employed in medicine. The species are natives of the shores of the Mediterranean and Iran, and are characterized by tall-growing pithy stems, and deeply-divided leaves, the segments of which are frequently linear. Ferula communis of English gardens is called giant fennel. Ferula orientalis and Ferula tingitana are said to yield African ammoniacum, a gum resin like asafetida, but less powerful.
Research Ferula