Braun, A.K.H. in Seubert, M.A. (1844), Flora Azorica: 17 [tax. nov.]

• Type: "A. Braun! plant. arab. un. it. 1837. nr. 984... Hab: in pratis montanis supra St. Barbaram ins. Terceirae. Coll. nr. 165."

Pichi Sermolli, R.E.G. (1954), Adumbratio Florae Aethiopicae 3. Ophioglossaceae, Osmundaceae, Schizaeaceae. Webbia; raccolta di scritti botanici 9(2): 632-641, Fig. 2A [secondary reference]

• Lectotype: "Typus (syntypus): In arena deserti prope Djeddam, 2 Jan. 1836, Schimper (Un. Itin. 1837) 984 (G!, BM!, P!)."

Chinnock, R.J. & Henshall, T.S. in Jessop, J.P. (ed.) (1981), Pteridophyta. Flora of Central Australia: 7, Fig. 11A [secondary reference]

Cunningham, G.M., Mulham, W.E., Milthorpe, P.L. & Leigh, J.H. (1981), Plants of Western New South Wales: 27 [secondary reference]

common name: Large Adder's Tongue [n/a]

Green, J.W. (1981), Census of the Vascular Plants of Western Australia: 3 [secondary reference]

Green, J.W. (1985), Census of the Vascular Plants of Western Australia Edn. 2: 25 [secondary reference]

Dunlop, C.R. (1987), Checklist of the Vascular Plants of the Northern Territory. Technical Report: Conservation Commission of the Northern Territory 26: 2 [secondary reference]

Wilson, Peter G. in Harden, G.J. (ed.) (1990), Ophioglossaceae. Flora of New South Wales 1: 18 [secondary reference]

Entwisle, T.J. in Walsh, N.G. & Entwisle, T.J. (ed.) (1994), Ferns and Allied Plants. Flora of Victoria Edn. 1, 2: 31-32, Fig. 5c [secondary reference]

Chinnock, R.J. in McCarthy, P.M. (ed.) (1998), Ophioglossaceae. Flora of Australia 48: 108, Fig. 47C, Map 66 APC [secondary reference]

• Type: "near Djeddam, 2 Jan.1836, Schimper?; BM, G, P..."

• APC Dist.: WA, NT, SA, Qld, NSW, Vic

Williams, K.A.W. (1999), Native Plants of Queensland 4: 292 [secondary reference]

Wilson, Peter G. in Harden, G.J. (ed.) (2000), Ophioglossaceae. Flora of New South Wales Revised Edition 1: 18 [secondary reference]

Short, P., Dixon, D. & Osterkamp Madsen, M. (2003), A review of the ferns and fern allies of the Northern Territory. The Beagle, Records of the Museums and Art Galleries of the Northern Territory 19(3): 19 [secondary reference]

Field, A.R. (2 January 2020), Classification and typification of Australian lycophytes and ferns based on Pteridophyte Phylogeny Group classification PPG I. Australian Systematic Botany 33(1): 15 [secondary reference]

• Type: "in arena deserti prope Djeddam [in desert near Jeddah], 2 Jan. 1836, W.P.Schimper 984 (lecto: BM 001038215*...)"

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