1. H.G.W.J. Schweickerdt Herbarium, Department of Plant Science; University of Pretoria; Pretoria, 0002 South Africa
2. Brooklyn Botanic Garden; 1000 Washington Avenue, Brooklyn, New York 11225 U.S.A
3. Office of the Chief Director: Biosystematics Research & Biodiversity Collections, South African National Biodiversity Institute; Private Bag X101, Pretoria, 0001 South Africa
4. Acocks Chair, H.G.W.J. Schweickerdt Herbarium, Department of Plant Science; University of Pretoria; Pretoria, 0002 South Africa