| Code name | English name | Location |
| LE | V. L. Komarov Botanical Institute, Saint-Pétersbourg | Russia |
| P | Muséum National d'Histoire Naturelle | France |
| K | Royal Botanic Gardens, Kew | England |
| E | Royal Botanic Garden, Edinburgh | England |
| BM | The Natural History Museum | England |
| G | Conservatoire et Jardin botaniques de la Ville de Genève | Switzerland |
| L | Nationaal Herbarium Nederland, Leiden University branch | Netherlands |
| B | Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien University Berlin | Germany |