oilC. zedoaria had the highest oil yield followed by C. sylvatica(0.62%), C. brog and C. caesia (0.50%), C. aromatica and C. malabarica(0.40%), while C. aeruginosa and C. rakthakanta had the lowest oilyield of 0.38% and 0.39% respectively. Rhizomes of C. rakthakanta,C. sylvatica, and C. zedoaria with greenish yellow, light yellow andorange flesh respectively, produced colorless oils. Essential oils ofC. caesia and C. malabarica, which are blue fleshed, were violet andbrownish violet respectively. C. longa oil was yellow in color, asreported by