Galbanum

Heb. helbenah, (Ex. 30:34), one of the ingredients in the holy incense. It is a gum, probably from the Galbanum officinale.

one of the perfumes employed in the preparation of the sacred incense. (Exodus 10:34) The galbanum of commerce is brought chiefly from India and the Levant. It is a resinous gum of a brownish-yellow color and strong disagreeable smell, usually met with in masses, but sometimes found in yellowish tear-like drops. But, though galbanum itself is well known, the plant which yields it has not been exactly determined.

gal'-ba-num (chelbenah; chalbdne):

A gum-resin which occurs in small, round, semitranslucent tears or in brownish yellow masses; has a pleasant aromatic odor and a bitter taste; and is today, at any rate, imported from Persia.

It is derived from certain umbelliferous plants, Ferula galbaniflua and F. rubricaulis. It is mentioned in Ex 30:34 as an ingredient of the holy incense, and also in /APC Sirach 24:15: "a pleasant odor .... as galbanum."