1. Inst. of Botany; Academy of Sciences of the Czech Republic; Zámek 1 CZ-252 43 Průhonice Czech Republic
2. Dept of Botany; Faculty of Biological Sciences, Univ. of South Bohemia; Branišovská 31 CZ-370 05 České Budějovice Czech Republic
3. Charles Univ. in Prague, Faculty of Sciences; Dept of Botany; Benátská 2 CZ-128 01 Praha 2 Czech Republic
4. 37 High Street East Linton Scotland United Kingdom
5. Dept of Plant Taxonomy and Nature Conservation; Univ. of Gdańsk; Wita Stwosza 59 PL-80-308 Gdańsk Poland
6. Dept of Agroecology, Faculty of Biology and Agriculture; Univ. of Rzeszów; Ćwiklińskiej 1a PL-35-601 Rzeszów Poland
7. 3 Green Close Woodlands Southampton SO40 7HU United Kingdom
8. Dailnamac, Taynuilt, Argyll Scotland United Kingdom