Chemodiversity of exudate flavonoids in some members of the Lamiaceae

Several newly studied species and further accessions of the Lamiaceae have been analyzed for their exudate flavonoid profiles. The principal compounds accumulated were flavones and their 6-methoxy derivatives, whereas flavonols were rarely encountered. The chemodiversity observed was relatively low, with only some 15 derivatives being found. The new data are discussed in relation to published data, and chemosystematic aspects are briefly addressed. Of the studied species, Salvia arizonica yielded only a rare diterpene quinone, demethylfruticulin A. Glandular hair diversification and different qualities of their secretions are briefly discussed.  2003 Elsevier Science Ltd. All rights reserved.