1. Department of Botany and Plant Biotechnology; University of Johannesburg; P.O. Box 524 Auckland Park 2006 South Africa
2. Compton Herbarium; South African National Biodiversity Institute; Private Bag X7 Claremont 7735 South Africa
3. Institute of Pharmacy and Molecular Biotechnology; University of Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany