1. Ghent University, Department of Biology, Research Group Spermatophytes, K.L. Ledeganckstraat 35, 9000 Gent, Belgium;, Email: kenneth.bauters@ugent.be
2. Ghent University, Department of Biology, Research Group Spermatophytes, K.L. Ledeganckstraat 35, 9000 Gent, Belgium
3. Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, U.K
4. University of Cape Town, Biological Sciences Department, Rondebosch 7700, South Africa
5. Ghent University, Department of Biology, Research Group Spermatophytes, K.L. Ledeganckstraat 35, 9000 Gent, Belgium, B.A. Krukoff Curator of African Botany, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, U.K