Ginger Rhizome Identity & Plant Part
The species is Zingiber officinale Roscoe, family Zingiberaceae, and the part used is the rhizome, the thick underground stem sold as ginger root. Leaves, stems and flowers are not used in this ginger extract. Several look-alikes carry the word ginger. Bitter ginger, Zingiber zerumbet, is a different species, galangal belongs to another genus, and black ginger, Kaempferia parviflora, is a separate plant altogether. The pungency of the rhizome comes from the gingerol family, which are phenolic ketones, and its aroma from a volatile oil rich in sesquiterpenes such as zingiberene. Fresh and dried rhizome differ in character, because drying and heat convert part of the gingerols, so the raw material for this extract is the dried rhizome.












