Chemical constituents of Lippia rigida Schauer (Verbenaceae)

摘要

Lippia L. is considered one of the largest genera of Verbenaceae, and comprises about 100 species distributed in the Neotropics and Africa ( O'Leary et al., 2012). Most of them are found in Brazil, Paraguay and Argentina ( Salimena, 2002). Recently, a study on species delimitation in Lippia section Goniostachyum was reported in the literature ( O'Leary et al., 2012), and several species were grouped into only four taxa: Lippia sericea Cham., Lippia grata Schauer, Lippia origanoids Kunth and Lippia stachyoides Cham. According to this study, L. rigida Schauer is considered synonymy of Lippia origanoides. Thus, the study on the chemical composition of L. rigida is of chemotaxonomic relevance. L. rigida was collected in June 2010 from Mucugê, Bahia state, Brazil, and identified by Professor Maria Lenise Silva Guedes (Departament of Botany, Federal University of Bahia, Brazil). Voucher specimen (1240) is deposited at the Herbarium Alexandre Leal Costa (ALCB, Federal University of Bahia, Brazil).