title: Hypericum species in the Páramos of Central and South America: a special focus upon H. irazuense Kuntze ex N. Robson.
abstract: Knowledge about members of the flowering plant family Clusiaceae occurring in the tropical mountain regions of the world is limited, in part due to endemism and restricted distributions. High altitude vegetation habitats (Páramos) in Central and South America are home to numerous native Hypericum species. Information related to the phytochemistry of páramo Hypericum, as well as ecological factors with the potential to influence chemical defenses in these plants, is briefly reviewed. Results of the phytochemical analysis of Hypericum irazuense, a species collected in the páramo of the Cordillera de Talamanca in Costa Rica, are presented. Lastly, guidelines for the viable and sustainable collections of plant material, to facilitate future investigations of these interesting plants, are given.
authors.affiliation: Institute Pharmaceutical Sciences, Pharmacognosy, Karl-Franzens-Universität Graz, Universitätsplatz 4, 8010 Graz, Austria.
authors.forename: Sara
authors.initials: S
authors.lastname: Crockett
authors.forename: Marianne
authors.initials: M
authors.lastname: Eberhardt
authors.forename: Olaf
authors.initials: O
authors.lastname: Kunert
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schühly