- 1962:
 (Meyer, Plagemann, Aeffke, Behrens, Wallbrecht, von Groddeck, Ingo Kliefoth, Bernd Kruse, cox Ahrens)
- 1966: (Meyer, Schreyer, Schwan, Luhn, Hertel, Henning, Ulbricht, Kuhn, cox Niehusen)
- 1970:
 (Borchmann, Jobst, Zander, Gust, Martens, Ahrendt, Foppke, Puls, cox Zahn)
- 1974:
 (Shealy, Stevenson, Cashin, Norelius, Everett, Vespoli, Mickelson, Brown, cox Weinberg)
- 1975: (Arndt, Döhn, Wendisch, Ulrich, Klatt, Kostulski, Karnatz, Prudöhl, cox Ludwig)
- 1977: (Sredzki, Lindner, Gottschalt, Kons, Lück, Frieberg, Karnatz, Gunkel, cox Jahncke)
- 1978: (Schumann, Karnatz, Sredzki, Ebert, Ulrich, Jährling, Dühring, Höing, cox Kaiser)
- 1979: (Schiller, Friedrich, Wenzel, Ulrich, Höing, Karnatz, Krauß, Rodewald, cox Ludwig)
- 1981:
 (Gudauskas, Solomakhin, Krilov, Diduk, Narushaitis, Narmontas, Pinskus, Maystrenka, cox Nizhegorodov)
- 1982:
 (O'Connell, Stanley, Stevenson, Keys, White-Parsons, White, Brook, Rodger, cox Hay)
- 1983: (Stanley, Stevenson, Rodger, White-Parsons, White, Mabbott, Keys, Atherfold, cox Hay)
- 1985: (Komarov, Diduk, Pinskus, But, Omelyanovich, Hurkovskiy, Voloshin, Vasilyev, cox Dmytrenko)
- 1986:
 (Galloway, Batten, Cooper, McKay, Doyle, Tomkins, Popa, Evans, cox Caterson)
- 1987: (Teti, Smith, Patton, Still, Nordell, McLaughlin, Burden, Pescatore, cox Bauer)
- 1989: (Puttlitz, Keßlau, Steffes-Mies, Balster, Dietrich, Mauerwerk, Wessling, Baar, cox Klein)
- 1990: (Baar, Balster, Dietrich, Korte, Richter, Steffes-Mies, Ungemach, Weyrauch, cox Klein)
- 1991: (Steffes-Mies, Balster, Fischer, Streppelhoff, Hecht, Klapheck, Wessling, Baar, cox Klein)
- 1993: (Baar, Hoeltzenbein, Lütkefels, Richter, Scholz, Steffes-Mies, Streppelhoff, von Ettingshausen, cox Thiede)
- 1994: (Brown, Hall, Honebein, Kaehler, Klepacki, Koven, McKibbon, Smith, cox Segaloff)
- 1995: (Baar, Forster, Kirchhoff, Landvoigt, Lerche, Richter, Sator, Weber, cox Thiede)
- 1997: (Ahrens, Bea, Henry, Kaehler, Miller, Richter, Wherley, Cummins, cox Cipollone)
- 1998: (Ahrens, Collins, Kaehler, Klepacki, Miller, Volpenhein, Welsh, Wherley, cox Cipollone)
- 1999: (Volpenhein, Kaehler, Collins, Welsh, Wherley, Klepacki, Miller, Ahrens, cox Cipollone)
- 2001:
 (Măstăcan, Corbeanu, Nemțoc, Florariu, Cornea, Bănică, Pîrvan, Măstăcan, cox Gheorghe)
- 2002:
 (Swick, Light, Rutledge, Hamilton, Stankevicius, Hoskins, Kreek, Powell, cox Price)
- 2003: (Stankevicius, Light, Rutledge, Hamilton, Calder, Hoskins, Kreek, Powell, cox Price)
- 2005: (Daniels, Deakin, Coppola, Beery, Inman, Volpenhein, Hoopman, McElhenney, cox Blomquist)
- 2006: (Dießner, Schulte, Koltzk, Stüer, Tebrügge, Siemes, Engelmann, Heidicker, cox Thiede)
- 2007: (Light, Rutledge, Byrnes, Wetzel, Howard, Seiterle, Kreek, Hamilton, cox Price)
- 2009: (Käufer, Hauffe, Mennigen, Wilke, Schmidt, Adamski, Seifert, Schmidt, cox Sauer)
- 2010: (Hauffe, Reinelt, Wilke, Mennigen, Schmidt, Müller, Seifert, Schmidt, cox Sauer)
- 2011: (Hauffe, Kuffner, Johannesen, Reinelt, Schmidt, Müller, Mennigen, Wilke, cox Sauer)
- 2013:
 (Ritchie, Ransley, Gregory, Reed, Sbihi, Triggs Hodge, Nash, Satch, cox Hill)
- 2014: (Reilly-O'Donnell, Tarrant, Satch, Gotrel, Reed, Bennett, Ransley, Louloudis, cox Hill)
- 2015: (Gotrel, Louloudis, Reed, Bennett, Sbihi, Gregory, Nash, Satch, cox Hill)
- 2017: (Weißenfeld, Wimberger, Planer, Johannesen, Schneider, Jakschik, Schmidt, Ocik, cox Sauer)
- 2018: (Weißenfeld, Wimberger, Planer, Johannesen, Schneider, Jakschik, Schmidt, Ocik, cox Sauer)
- 2019: (Weißenfeld, Follert, Reinhardt, Johannesen, Schneider, Jakschik, Schmidt, Ocik, cox Sauer)
- 2022: (Gibbs, Bolding, Bewicke-Copley, Carnegie, Elwes, Digby, Rudkin, Ford, cox Brightmore)
- 2023: (Dawson, Bolding, Gibbs, Carnegie, Elwes, Digby, Rudkin, Ford, cox Brightmore)
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Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction