Ginger Powder (Zingiber officinale) comes from the dried root, or rhizome, of the ginger plant. The root has tan skin, ivory to golden flesh and a peppery, slightly sweet flavor.The ginger plant has a thick, branched rhizome (underground stem) with a brown outer layer and yellow centre that has a spicy, citrusy aroma. Every year, it grows pseudostems (false stems made of tightly wrapped leaf bases) from the rhizome which bear narrow leaves.