Concise hierarchy

(Kingdom) Plantae - (Phylum) Tracheophyta - (Class) Polypodiopsida - (Order) Psilotales - (Family) Psilotaceae

Subsequent positions

Psilotaceae (Clade) Eichler 1886 [Cantino & Donoghue 2007]

Ref: P.D. Cantino et al., 2007: E15.

Current position

Psilotaceae (Family) J.W.Griff. & Henfr. (1855)

Ref: PPG I, 2016: 571.

Alternative positions

Psilotaceae (Clade) Eichler 1886 [Cantino & Donoghue 2007]

Ref: P.D. Cantino et al., 2007: E15. [new position]

Historical positions

Psilotaceae (Family) J.W.Griff. & Henfr. (1855)	Ref: D.J. Mabberley, 2017: 766.
Psilotaceae (Family) J.W.Griff. & Henfr. (1855)	Ref: PPG I, 2016: 571.
Psilotaceae (Family) J.W.Griff. & Henfr. (1855)	Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 47.
Psilotaceae (Family) J.W.Griff. & Henfr. (1855)	Ref: D.J. Mabberley, 2008: 712.
Psilotaceae (Clade) Eichler 1886 [Cantino & Donoghue 2007]	Ref: P.D. Cantino et al., 2007: E15. [new position]
Psilotaceae (Family) J.W.Griff. & Henfr. (1855)	Ref: A.R. Smith et al., 2006: 709.
Psilophyta (Phylum)	Ref: L. Margulis & K.V. Schwartz, 1998: 392. [rough position]
Psilophytae (Infraphylum) T. Cavalier-Sm. (1998)	Ref: T. Cavalier-Smith, 1998: table 6 (p. 251). [rough position]
Psilotaceae (Family) J.W.Griff. & Henfr. (1855)	Ref: J.T. Mickel, 1982: 337.

Number of Subtaxa

2024	Available in Systema Naturae 2000	2s
1989-present	Systema Naturae 2000	2s
2010	Royal Botanic Gardens, Kew & Missouri Botanical Garden: 10 Aug 2011	2s
2006	A.R. Smith et al.: 709	2s
1998	L. Margulis & K.V. Schwartz	2s
1982	J.T. Mickel	2s