They are increased by division of the stem or rhizome, or by seeds.

The rhizome, which is the officinal part, though yellow in the recent root, becomes of a dark yellowish-brown by age.

Scales of rhizome and stipes narrow, of firm texture and with thick-walled cells.

Rhizome short with membranous, orange or brown scales having a few bluntish teeth on each edge.

Oleum zingiberis, L. From the dried root (rhizome) of Zingiber officinale, or ginger of commerce.

Both leaves and flowers have been used in medicine, but the rhizome is the part most frequently used.

Fibrous yellow rootlets are produced from the sides of the rhizome.

The root or rhizome of Potentilla Tormentilla, It is astringent and febrifuge, without being stimulant.

Ingwer), the rhizome or underground stem of Zingiber officinale (nat.

The rhizome contains an acid resin and volatile oil, starch and gum.