1. Inst. of Systematic Botany, Univ. of Zurich; Zollikerstrasse 107 CH-8008 Zurich Switzerland
2. Dept of Biology; Univ. of Turku; FI-20014 Turku Finland
3. Dept of Biology; Central Mindanao Univ.; Musuan, Bukidnon Philippines
4. Indonesian Inst. of Sciences (LIPI); Botany Division; Jl. Raya Jakarta - Bogor Km. 46 Cibinong 16911 Indonesia
5. Nees Inst. of Plant Biodiversity, Univ. of Bonn; Meckenheimer Allee 170 DE-53115 Bonn Germany
6. Dept of Geography; Philipp's Univ. Marburg; Deutschhausstrasse 10 DE-35032 Marburg Germany