1. Dr W. Lobin & M. Neumann, Botanische Gärten, Meckenheimer Allee 171, D-53115 Bonn, Germany.
2. Dr J. Bogner, Augsburger Str. 43a, D-86368 Gersthofen, Germany.
3. P. C. Boyce, Malesiana Tropicals, Level 5, Tun Jugah Tower, No. 18, Jalan Tunku Abdul Rahman, 93100 Kuching, Sarawak, Malaysia.