Tanaecium Sw. emend L.G. Lohmann (Bignonieae, Bignoniaceae, Lamiales) is a genus of Neotropical lianas comprising 21 species distributed from Mexico through Argentina. Despite the medicinal and economic importance of several species of the genus, little is still known about the phytochemistry and chemical composition of foliar cuticular waxes of members of Tanaecium. In this study, we extracted the lipophilic compounds of diverse specimens of seventeen species of Tanaecium and four species of the closely related genus Fridericia Mart. Derivatized compounds were identified by gas chromatography (CG) coupled with mass spectrometry (MS) and by comparison with standards. Relative abundances were estimated and investigated by statistical methods (multivariate and cluster analyses). Leaf cuticular waxes were composed by n-alkanes, fatty acids, primary alcohols, terpenoids, and steroids with n-alkanes C₂₉, C₃₁, and C₃₃ representing the major constituents in addition to octacosanol, β-sitosterol, ursolic, montanic, and palmitic acids. Multivariate analyses of surface compounds supported earlier morphological and molecular data, corroborating the recent placement of some species within Tanaecium and providing sufficient characters to clearly distinguish members of Tanaecium and Fridericia.

Tanaecium西南。emend LG Lohmann (Bignoniaae, Bignoniaceae, Lamiales) 是新热带藤本植物的一个属，包括从墨西哥到阿根廷分布的 21 种。尽管该属的几个物种具有药用和经济重要性，但人们对金银花成员叶表皮蜡的植物化学和化学成分知之甚少。在这项研究中，我们提取了 17 种Tanaecium和 4 种密切相关的Fridericia属的不同标本的亲脂性化合物玛特。衍生化合物通过气相色谱 (CG) 与质谱 (MS) 联用并通过与标准品的比较进行鉴定。通过统计方法（多变量和聚类分析）估计和研究相对丰度。叶表皮蜡由正烷烃、脂肪酸、伯醇、萜类和类固醇组成，其中正烷烃 C ₂₉、C ₃₁和 C ₃₃代表主要成分，此外还有二十八烷醇、β-谷甾醇、熊果酸、褐煤酸、和棕榈酸。表面化合物的多变量分析支持了早期的形态学和分子数据，证实了最近在Tanaecium 中的一些物种的位置，并提供了足够的特征来清楚地区分Tanaecium和Fridericia。