1Laboratory of Plant Systematics, K.U.Leuven, Kasteelpark Arenberg 31, PO Box 2437, BE-3001 Leuven, Belgium,
2National Botanic Garden of Belgium, Domein van Bouchout, BE-1860 Meise, Belgium,
3H.G.W.J. Schweickerdt Herbarium, University of Pretoria, Pretoria 0002, South Africa,
4Laboratory of Plant Biochemistry and Physiology, University of Antwerp, Universiteitsplein 1, BE-2610 Antwerp, Belgium,
5Netherlands Centre for Biodiversity Naturalis, PO Box 9517, 2300 RA Leiden, the Netherlands,
6National Herbarium of the Netherlands, Leiden University, PO Box 9514, 2300 RA Leiden, the Netherlands
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Corresponding author:
Benny Lemaire , Tel: 0032-16-32-86-36,