OR ginger lesser galangale See lesser galangal . These are flower buds that emerge from a variety of ginger. They're quite mild. Look for them in Japanese markets. Siamese ginger See galangal .
Thai ginger See galangal .
You can find fresh roots in Southeast Asian and Indian markets, but dried ground turmeric is far more commonly used. OR Steep annatto seeds in boiling water for 20 minutes, then discard the seeds.