Constituents of Encyclia longifolia Schltr. (Orchidaceae)

Isolation and Characterization of the ‘Flavonoid Crystals’ of Three Species of Prosthechea: Chemotaxonomic Considerations of the Genera Prosthechea and Encyclia

“…Our aim is to find a likely chemical basis for this observation by studying the nature of these so called 'flavonoid crystals' in several Prosthechea species and to prove the alleged [1] absence of the same in Encyclia species. In a recent phytochemical study [8] of the aerial parts of E. longifolia, a small amount of vitexin was detected in the total MeOH extract. In the present study, we wish to report the results of our examination and characterization of the 'flavonoid crystals' from three species of Prosthechea, namely, P. fragrance, P. vespa and P. caetensis.…”