Abstract Thymus pulegioides L. ssp pulegioides samples were collected in 1995â1999 in Vilnius city according to their odors. Five chemotypes of the essential oils were identified: 1) citral/geraniol chemotype ("lemon" odor): citral (neral + geranial, 18.4â30.2%), geraniol (14.4â23.2%), β-caryophyllene (9.4â13.1%) and nerol (5.5â12.1%); 2) geraniol chemotype ("sweet" odor): geraniol (23.1â25.5%), β-caryophyllene (10.8â13.5%) and β-bisabolene (9.5â10.2%); 3) caryophyllene chemotype ("spicy" odor): β-caryophyllene (18.0â19.7%), β-bisabolene (14.5â15.9%), germacrene D (12.5â14.6%) and (E)-nerolidol (8.2â13.8%); 4) γ-terpinene/p-cymene chemotype ("hydrocarbon" odor): γ-terpinene (15.5â17.2%), p-cymene (7.7â17.0%), carvacrol (4.6â13.5%) and β-caryophyllene (9.6â10.5%); 5) carvacrol chemotype ("phenolic" odor): carvacrol (24.4â33.3%), β-caryophyllene (9.5â14.9%) and β-bisabolene (10.5â12.9%). The caryophyllene and γ-terpinene/p-cymene chemotypes were not observed earlier in Thymus pulegioides L. Key Word Index: Thymus pulegioides Labiataeessential oil compositionp-cymeneγ-terpineneneralgeraniolgeranialβ-caryophylleneβ-bisabolene