Wormwood:

wurm'-wood (la'anah (De 29:18; Pr 5:4; Jer 9:15; 23:15; La 3:15,19; Am 5:7; 6:12, the King James Version hemlock); apsinthos (Re 8:11)): What the Hebrew la‘anah may have been is obscure; it is clear it was a bitter substance and it is usually associated with "gall"; in the Septuagint it is variously translated, but never by apsinthos, "wormwood." Nevertheless all ancient tradition supports the English Versions of the Bible translation. The genus Artemisia (Natural Order Compositae), "wormwood," has five species of shrubs or herbs found in Palestine (Post), any one of which may furnish a bitter taste. The name is derived from the property of many species acting as anthelmintics, while other varieties are used in the manufacture of absinthe.

Written by E. W. G. Masterman