Hydrodistilled essential oils from the herbal parts of Adenandra obtusata Sond. and A. villosa (P.J.Bergius) Licht. ex Roem. et Schult. were analyzed by GC and GC/MS. Thirty-seven compounds were characterized in the oil of A. obtusata, representing 95.2% of the oil. Main compounds were 2-undecanone (33.3%), alpha-pinene (33.2%) and myrcene (2.4%). Forty-five compounds were characterized in the oil of A. villosa, representing 97.6% of the oil with myrcene (49.6%), sabinene (13.8%), 1,8-cineole + beta-phellandrene (6.6%), (Z)-beta-ocimene (4.2%) and limonene (3.7%) as main constituents.