The Probert Encyclopaedia of Nature

TURMERIC

Turmeric (Curcuma) is a perennial, reed-like plant of the ginger family native to India. The roots are hard and resinous and when ground yield a yellow powder with a marked aromatic odour which forms the base of curry powder and has been used as a dye in India and China for colouring silks, though it is not fast in light.
Research Turmeric