Abstract The constituents of the secretory hairs of Agastache foeniculum Kuntze leaves were sampled by means of glass microneedles and analyzed by GC and GC/MS. The main components of the secretory mixture were methyl chavicol (59.5%) and (E)-anethole (19.6%). The composition of the secretory mixture was also compared with the composition of the essential oils obtained by hydrodistillation of the leaves. Key Word Index: Agastache foeniculum Labiataesecretory hairGC-microneedle shuttle analysisessential oil compositionmethyl chavicol(E)-anethole