[1] Wageningen Univ & Res, Biosystemat Grp, Droevendaalsesteeg 1, NL-6708 PB Wageningen, Netherlands
[2] Royal Bot Gardens, Richmond TW9 3AB, Surrey, England
[3] Singapore Bot Gardens, Herbarium, Natl Pk Board,1 Cluny Rd, Singapore 259569, Singapore
[4] Nat Biodivers Ctr, Sect Bot, POB 9517, NL-2300 RA Leiden, Netherlands