2018-10-312018-10-312011-02SILVA, Julierme G. et al. Chemotaxonomic significance of volatile constituents in Hypenia (Mart. ex Benth.). R. Harley (Lamiaceae). Journal of the Brazilian Chemical Society, Campinas, v. 22, n. 5, p. 953-958, Feb. 2011.1678-4790e- 0103-5053http://repositorio.bc.ufg.br/handle/ri/16303Multivariate analysis of essential oil compositions of thirteen Hypenia species revealed the presence of two taxonomic clusters. Cluster I included three species belonging to section Densiflorae in addition to H. subrosea and H. aristulata, and showed the highest percentages of a-muurolol (5.85 ± 3.08%). In Cluster II, which contained eight species belonging to section Laxiflorae, the major discriminant constituents were (E)-caryophyllene (7.09 ± 4.88%), germacrene D (18.1 ± 11.4%), and bicyclogermacrene (6.65 ± 1.19%). All essential oils showed a predominance of sesquiterpenes, such as spathulenol (4.5-31.6%), caryophyllene oxide (2.2-14.4%) and selin‑11‑en-4a-ol (0-34.8%). Furthermore, identical clusters were revealed by multivariate analysis of chemical constituents based on carbon skeletons, as well as on 18 morphological leaf characters of the species studied.engAcesso AbertoHypeniaLamiaceaeEssential oilChemical variabilityChemotaxonomyMultivariate analysisArtigo10.1590/S0103-50532011000500020