- 1974:
 (Dobler, Lehmann, Richter, Schwede, Ahrenholz, Müller, Blanke, Mosig, cox Brincker)
- 1975: (Goretzki, Knetsch, Richter, Schwede, Kallies, Neu, Nitsche, Mosig, cox Wilke)
- 1977: (Bügel, Steindorf, Lohs, Neisser, Sandig, Kurth, Schwede, Metze, cox Heß)
- 1978:
 (Yermakova, Paziun, Antoniuk, Bunjak, Dergatchenko, Umanets, Tereshina, Pivovarova, cox Frolova)
- 1979: (Antoniuk, Bunjak, Dergatchenko, Yermakova, Paziun, Tereshina, Umanets, Pivovarova, cox Frolova)
- 1981: (Baltutite, Teterina, Tereshina, Yatsenko, Makushkina, Shvetsova, Umanets, Paziun, cox Frolova)
- 1982: (Makushkina, Konopleva, Umanets, Tereshina, Yatsenko, Studneva, Doligaida, Stone, cox Frolova)
- 1983: (Stone, Averyanova, Konopleva, Studneva, Umanets, Tereshina, Yatsenko, Makushkina, cox Khokhlova)
- 1985: (Pukhayeva, Zakyrova, Tereshina, Suprun, Znak, Teterina, Yatsenko, Averyanova, cox Khokhlova)
- 1986: (Tereshina, Suprun, Sakirova, Pukhayeva, Znak, Teterina, Averyanova, Tsessiunaite, cox Khokhlova)
- 1987:
 (Vîrlan, Trașcă, Țicanu, Arba, Chelariu, Necula, Homeghi, Toader, cox Oancia)
- 1989: (Bălan, Curelea, Tănase, Soare, Chelariu, Neculai, Leonte, Armășescu, cox Oancia)
- 1990: (Șnep, Bobeică, Burcică, Cochela, Curela, Oprea, Popescu, Ciucanu-Robu, cox Nedelcu)
- 1991:
 (Barnes, Delehanty, Doey, Heddle, Mahon, McBean, Monroe, Taylor, cox Thompson)
- 1993: (Alupei, Bobeică, Cochela, Doroftei, Ignat, Neculai, Olteanu, Tănase, cox Ilie)
- 1994:
 (Haacker, Klapheck, Schmidt, Martin, Pyritz, Rehaag, Wagner, Werremeier, cox Schnell)
- 1995:
 (Dore, Fallon, Fuller, Kakela, Korholz, E. McCagg, M. McCagg, Tranel-Michini, cox Farooq)
- 1997: (Damian, Susanu, Olteanu, Cazac, Gafencu, Cochela, Ignat, Tănase, cox Georgescu)
- 1998: (Cazac, Cochela, Damian, Dumitrache, Gafencu, Ignat, Olteanu, Susanu, cox Georgescu)
- 1999: (Damian, Dumitrache, Ignat, Olteanu, Popescu, Spîrcu, Susanu, Bărăscu, cox Georgescu)
- 2001:
 (Winter, Lutz, Wilson, Robinson, Martin, Sattin, Roberts, Larsen, cox Bilson)
- 2002: (Johnson, Peirce, Davies, Urtasun, Marten, Cox, Mickelson, Mackenzie, cox Whipple)
- 2003: (Hipler, Pyritz, Tucholke, Holthaus, Schmidt, Zimmermann, Günther, Wech, cox Ruppel)
- 2005: (Outhwaite, Selby Smith, Mills, Hornsey, Martin, Chew, Frasca, Heard, cox Patrick)
- 2006: (Sickler, Cooke, Goodale, Shoop, Mickelson, Francia, Lind, Davies, cox Whipple)
- 2007: (Sickler, Shoop, Goodale, Magee, Mickelson, Francia, Lind, Davies, cox Whipple)
- 2009: (Cafaro, Allen, Larsen-Strecker, Francia, Goodale, Shoop, Lind, Glessner, cox Snyder)
- 2010: (Goodale, Polk, Redman, Ritzel, Lofgren, Logan, Musnicki, Glessner, cox Whipple)
- 2011: (Lofgren, Francia, Musnicki, Ritzel, Redman, Polk, Lind, Logan, cox Whipple)
- 2013: (Polk, Simmonds, Regan, Schmetterling, Luczak, Musnicki, Opitz, Lind, cox Snyder)
- 2014: (Opitz, Musnicki, Polk, Schmetterling, Luczak, Lind, Logan, Robbins, cox Snyder)
- 2015: (Opitz, Musnicki, Polk, Schmetterling, Regan, Simmonds, Gobbo, Robbins, cox Snyder)
- 2017: (Vrînceanu, Bejinariu, Petrilă, Popa, Bereș, Tîlvescu, Boguș, Oprea, cox Druncea)
- 2018: (O'Brien, Mueller, Opitz, Doonan, Moffat, Eisser, Regan, Coffey, cox Guregian)
- 2019:
 (Greenslade, Dyke, Spoors, Bevan, Prendergast, Williams, Ross, Gowler, cox Shepherd)
- 2022: (Rusu, Buhuș, Ailincăi, Tivodariu, M. Bereș, A. Bereș, Vrînceanu, Radiș, cox Petreanu)
- 2023: (Rusu, Anghel, Adam, Buhuș, M. Bereș, Tivodariu, Vrînceanu, A. Bereș, cox Petreanu)
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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