1. Office of the Chief Director: Research and Scientific Services, South African National Biodiversity Institute, Private Bag X101, Pretoria, 0001 South Africa / Acocks Chair Department of Botany, University of Pretoria Pretoria 0002 South Africa
2. H. G. W. J. Schweickerdt Herbarium, Department of Botany, University of Pretoria Pretoria 0002 South Africa
3. L. H. Bailey Hortorium, Dept. Plant Biology, 228 Plant Sciences, Cornell University, Ithaca New York 14853 U.S.A.
4. Herbarium, Royal Botanic Gardens, Kew, Richmond Surrey TW9 3AB U.K.