1968–1980
Winston Ryder (1968) Don Challis and Simon Kaye (1969)Don Hall , David Dockendorf and William Edmondson (1970)Vittorio Trentino and Giuseppe Muratori (1971) David Hildyard , Robert Knudson and Arthur Piantadosi (1972)Les Wiggins , Gordon McCallum and Keith Grant (1973)Art Rochester , Nat Boxer , Michael Evje and Walter Murch (1974)William A. Sawyer, James Webb , Chris McLaughlin and Richard Portman (1975) Les Wiggins , Clive Winter and Ken Barker (1976)Peter Horrocks, Gerry Humphreys , Simon Kaye , Robin O'Donoghue and Les Wiggins (1977) Sam Shaw , Robert Rutledge , Gordon Davidson, Gene Corso, Derek Ball , Don MacDougall , Bob Minkler , Ray West , Michael Minkler , Les Fresholtz , Richard Portman and Ben Burtt (1978)Derrick Leather, Jim Shields and Bill Rowe (1979) Christopher Newman , Les Wiggins and Michael J. Kohut (1980) 1981–2000
Don Sharpe , Ivan Sharrock and Bill Rowe (1981)James Guthrie , Eddy Joseph , Clive Winter, Graham V. Hartstone and Nicolas Le Messurier (1982)Willie D. Burton , Michael J. Kohut and William Manger (1983)Ian Fuller, Clive Winter and Bill Rowe (1984) John Nutt, Christopher Newman and Mark Berger (1985) Tom McCarthy Jr. , Peter Handford and Chris Jenkins (1986)Jonathan Bates , Simon Kaye and Gerry Humphreys (1987)Charles L. Campbell , Louis Edemann , Robert Knudson and Tony Dawe (1988)Bill Phillips , Danny Michael , Robert J. Litt , Elliot Tyson and Rick Kline (1989)J. Paul Huntsman , Stephan von Hase, Chris Jenkins , Gary Alexander and Doug Hemphill (1990)Lee Orloff , Tom Johnson , Gary Rydstrom and Gary Summers (1991)Tod A. Maitland , Wylie Stateman , Michael D. Wilhoit , Michael Minkler and Gregg Landaker (1992)John Leveque , Bruce Stambler , Becky Sullivan , Scott D. Smith , Donald O. Mitchell , Michael Herbick and Frank A. Montaño (1993)Stephen Hunter Flick , Gregg Landaker , Steve Maslow , Bob Beemer and David MacMillan (1994)Per Hallberg , Lon Bender , Brian Simmons , Andy Nelson , Scott Millan and Anna Behlmer (1995)Jim Greenhorn, Toivo Lember, Livia Ruzic, Roger Savage and Gareth Vanderhope (1996) Terry Rodman, Roland N. Thai, Kirk Francis , Andy Nelson , Anna Behlmer and John Leveque (1997) Gary Rydstrom , Ron Judkins , Gary Summers , Andy Nelson and Richard Hymns (1998)David Lee , John T. Reitz , Gregg Rudloff , David E. Campbell and Dane Davis (1999)Jeff Wexler , Doug Hemphill , Rick Kline , Paul Massey and Michael D. Wilhoit (2000) 2001–present
Andy Nelson , Anna Behlmer , Roger Savage , Guntis Sics , Gareth Vanderhope and Antony Gray (2001)Michael Minkler , Dominick Tavella , David Lee and Maurice Schell (2002)Richard King , Doug Hemphill , Paul Massey and Art Rochester (2003)Karen Baker Landers , Per Hallberg , Steve Cantamessa , Scott Millan , Greg Orloff and Bob Beemer (2004)Paul Massey , Doug Hemphill , Peter Kurland and Donald Sylvester (2005)Chris Munro , Eddy Joseph , Mike Prestwood Smith , Martin Cantwell and Mark Taylor (2006)Kirk Francis , Scott Millan , Dave Parker , Karen Baker Landers and Per Hallberg (2007)Glenn Freemantle , Resul Pookutty , Richard Pryke , Tom Sayers and Ian Tapp (2008)Ray Beckett and Paul N. J. Ottosson (2009)Richard King , Lora Hirschberg , Gary Rizzo and Ed Novick (2010)Philip Stockton , Eugene Gearty , Tom Fleischman and John Midgley (2011)Simon Hayes , Andy Nelson , Mark Paterson , Jonathan Allen, Lee Walpole and John Warhurst (2012)Glenn Freemantle , Skip Lievsay , Christopher Benstead , Niv Adiri and Chris Munro (2013)Thomas Curley , Ben Wilkins and Craig Mann (2014)Lon Bender , Chris Duesterdiek , Martin Hernández , Frank A. Montaño , Jon Taylor and Randy Thom (2015)Claude La Haye , Bernard Gariépy Strobl and Sylvain Bellemare (2016)Alex Gibson , Richard King , Gregg Landaker , Gary Rizzo and Mark Weingarten (2017)John Casali , Tim Cavagin , Nina Hartstone , Paul Massey and John Warhurst (2018)Scott Millan , Oliver Tarney , Rachael Tate , Mark Taylor and Stuart Wilson (2019)Jaime Baksht , Nicolas Becker , Phillip Bladh , Carlos Cortés and Michelle Couttolenc (2020)Ron Bartlett , Theo Green , Doug Hemphill , Mark Mangini and Mac Ruth (2021)Lars Ginzel , Frank Kruse , Viktor Prášil and Markus Stemler (2022)Johnnie Burn and Tarn Willers (2023) 
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