Abstract The essential oil of Becium grandiflorum subsp. grandiflorum, a perennial aromatic shrub endemic to Ethiopia, was analyzed by GC and GC/MS. The major components of the oil were, in addition to three unknown constituents (10.0%, 9.7%, and 1.7%, respectively) identified as (Z)-Î²-ocimene (17.6%), myrcene (8.4%), limonene (8.0%), and Î²-caryophyllene (7.6%). Key Word Index: Becium grandiflorum subsp. grandiflorum Lamiaceaeessential oil composition(Z)-Î²-ocimene