Acknowledgements

We would like to thank the following persons and institutions for supporting our project:

Biodiversity Heritage Library (https://www.biodiversitylibrary.org/)
www.plantillustrations.org

Carol Abbott
Dr. Michael Barfuss
Prof. Dr. Wilhelm Barthlott
Dr. Ralf Bauer
Gerhard Buys
Peter Coxhead
Angela K. Erwin
Chuck Everson (Rainbow Gardens)
Christina M. Ghiasvand
Michele Goddard
Lucia Gorniak
Charmaine Harper
Miranda van Heden
Sherry Jesberger
Glen Lord
Kazuhiro Miyahara
Heinz Peter Mohrdieck
Antonio Palomo
Patty Petry
Mark Preston
Gordon Rollason
Valter Eugenia Saia
Mary Saylor
Vera Shekh
Linda Sinkovic
Hong Trimble
Ilona de Vries
Vivian Filus de Oliveira
Jo Old
Alena Rozhkova
Birgit Deiss
Jaap Bosman
André Norman
Angela Champagne
Gunnar Ovstebo
Shacarah Gagnon-Kvale
J. de Vries Potplantencultures b.v.
Reem Alqoubaili
Hofland Flowering Plants
Susanne Schuhmann
Reinhart Schade
Ilza Cristiane Calixto Calixto
Nastya Morozova
Tracy Brewster
Michael J. Viray
Patty Colleran Wildman
Lilia Aristova
Irina Tsymbalist
Olga Pokhvalitova
David Cooperman
Patrick Alain Poméon
Olga Andreicheva
Zlata Metlushko
Darlene Peterson
Mariceli Freimut da Silva

If we have forgotten someone, we apologize.

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