Michael F. Fay - Royal Botanic Gardens, Kew
L. Andriamahefarivo - AMDUSA
S. P. Bachman - Royal Botanic Gardens, Kew
M. J. M. Brown - Royal Botanic Gardens, Kew
J. Calevo - Royal Botanic Gardens, Kew
T. Campbell - The University of Western Australia
M. Charitonidou - Royal Botanic Gardens, Kew
K. W. Dixon - The University of Western Australia
V. Droissart - Université de Montpellier
F. Forest - Royal Botanic Gardens, Kew
A. E. Hinsley - Royal Botanic Gardens, Kew
P. Kumar - Miami Dade College - North Campus (USA, Miami)
T. Le Breton - University of New South Wales
L. R. Rajaovelona - Royal Botanic Gardens ( Madagascar)
B. Ramandimbisoa - Missouri Botanical Garden (MBG) (Madagascar)
H. Rankou - Royal Botanic Gardens, Kew
A. Schuiteman - Royal Botanic Gardens, Kew
J. Sharma - Texas Tech University
M. Simo-Droissart - Université de Montpellier
E. C. Smidt - Universidade Federal do Paraná
T. Stévart - AMDUSA
V. J. Svahnström - Royal Botanic Gardens, Kew
S. Verlynde - AMDUSA
H. C. Zimmer - Australian National Herbarium