Concise hierarchy

(Kingdom) Plantae - (Phylum) Tracheophyta - (Class) Polypodiopsida - (Order) Osmundales

Subsequent positions

Leptosporangiatae (Clade) Bessey 1907 [Cantino & Donoghue 2007]

Ref: P.D. Cantino et al., 2007: E16.

Current position

Osmundales (Order) Bercht. & J.Presl (1820)

Ref: PPG I, 2016: 572.

Alternative positions

Filicales (Order) Dumort. (1829), nom. illeg.	Ref: J.T. Mickel, 1982: 342.
Filicopsida (Class) C.Agardh (1822)	Ref: R. van der Meijden, 1990: 61.
Leptosporangiatae (Clade) Bessey 1907 [Cantino & Donoghue 2007]	Ref: P.D. Cantino et al., 2007: E16. [new position]

Historical positions

Osmundales (Order) Bercht. & J.Presl (1820)	Ref: D.J. Mabberley, 2017: 661-662, App. (p. 998).
Osmundales (Order) Bercht. & J.Presl (1820)	Ref: PPG I, 2016: 572.
Osmundales (Order) Bercht. & J.Presl (1820)	Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 49.
Osmundales (Order) Bercht. & J.Presl (1820)	Ref: T.N. Taylor et al., 2009: table (p. 386), App. 1 (p. 1028).
Osmundales (Order) Bercht. & J.Presl (1820)	Ref: D.J. Mabberley, 2008: 614, 928.
Leptosporangiatae (Clade) Bessey 1907 [Cantino & Donoghue 2007]	Ref: P.D. Cantino et al., 2007: E16. [new position]
Osmundales (Order) Bercht. & J.Presl (1820)	Ref: A.R. Smith et al., 2006: 710, fig. 2; 727.
Osmundales (Order) Bercht. & J.Presl (1820)	Ref: A.B. Doweld, 2001: IX.
Osmundales (Order) Bercht. & J.Presl (1820)	Ref: C.J. Cleal & B.A. Thomas, 1995: 13.
Filicopsida (Class) C.Agardh (1822)	Ref: R. van der Meijden, 1990: 61.
Filicales (Order) Dumort. (1829), nom. illeg.	Ref: J.T. Mickel, 1982: 342.
Pteridophyta (Division) Schimp. (1879)	Ref: D.M. Moore, 1982: 2. [rough position] [indirect]
Osmundales (Order) Bercht. & J.Presl (1820)	Ref: L.J. Audus & V. Heywood, 1981: 1246.

Number of Subtaxa

2025	Available in Systema Naturae 2000	6g;6s; †14g;2s
1989-present	Systema Naturae 2000: 16 Jun 2023	[6g; †14g]
2017	D.J. Mabberley: 661	4g;14s
2016	PPG I: 572	[6g]
2015	A. Novikoff & B. Barabasz-Krasny: 49	[4g; †14g]
2010	Royal Botanic Gardens, Kew & Missouri Botanical Garden: 12 Aug 2011	3g;13s
2008	D.J. Mabberley: 614	3g;14s
2006	A.R. Smith et al.: 710	3g;~20s
1982	J.T. Mickel	3g[21s]
1981	L.J. Audus & V. Heywood	5g;20s