Acknowledgments
The authors thank the following persons and institutions for cooperation and help:
Beijing Press, Beijing, for permission to reproduce line drawings from Ying, T.S., Zhang, Y.L. & D.E.Boufford: The endemic genera of seed plants of China (1993) and Wang, W.T., Pan, K.Y., Zhang, Z.Y. & Li, Z.Y., Gesneriaceae. In: Flora reipublicae popularis sinicae 69 (1990)
Jeanne Katzenstein, American Gloxinia and Gesneriad Society, for permission to reproduce drawings and photographs from "The Gloxinian"
B. L. Burtt, Royal Botanic Garden Edinburgh, Scotland, UK, for continuous cooperation and sharing knowledge over three decennia
James F. Smith, Dept. of Biology, Boise State University, Boise, Idaho, USA, for reading the descriptions
John K. Boggan, Dept. of Botany, Smithsonian Institution, Washington DC, USA, for providing manifold information on neotropical Gesneriaceae
Alain Chautems, Conservatoire et Jardin Botanique de la Ville de Genève, CH, for providing valuable information and photographs since many years
Michael Möller, Royal Botanic Garden Edinburgh, Scotland, UK, for providing information on African Gesneriaceae
Li Zhen-Yu, State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Bijing, China
Wang Yin-Zheng, State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Bijing, China
Wilhelm Barthlott, Botanisches Institut und Botanischer Garten Bonn, Germany, for providing excellent photographs of various plant families
Susanne Sontag, Institute of Botany, University of Vienna, A, for manifold technical assistance
Monika Paschinger, Johannes Selinger and Susanne Gockner-Mayer, Institute of Botany, University of Vienna, A, for typing work