1. Centre for Pharmacognosy and Phytotherapy, The School of Pharmacy, University of London, 29–39 Brunswick Square, London, WC1N 1AX, UK
2. Fakultät Biologie, Department I, Biodiversitätsforschung, Systematische Botanik, Ludwig-Maximilians-Universität, Menzinger Str. 67, 80638 München, Germany
3. Universidad del Valle de Guatemala, Instituto de Investigaciones, Herbario UVAL, 18 Avenida 11–95, Zona 15, V.H. III, Guatemala, Guatemala, CA