| Verfasser | Häufigkeit |
| Barrie, Fred R. 1948- |
2 |
| Greuter, Werner 1938- |
2 |
| Hawksworth, D. L. 1946- |
2 |
| Herendeen, Patrick S. 1959- |
2 |
| Knapp, Sandra 1956- |
2 |
| Kusber, Wolf-Henning |
2 |
| Li, Dezhu |
2 |
| Marhold, Karol |
2 |
| May, Tom W. |
2 |
| McNeill, John 1933- |
2 |
| Prado, Jefferson |
2 |
| Price, Michelle J. |
2 |
| Smith, Gideon 1959- |
2 |
| Turland, Nicholas J. |
2 |
| Wiersema, John H. 1950- |
2 |
| International Botanical Congress |
1 |
| International Botanical Congress Shenzhen |
1 |
| Loeb, Arthur L. |
1 |
| Loizeau, Pierre-André 1959- |
1 |
| Maeder, Anouchka |
1 |