Asplenium trichomanes subsp. quadrivalens D.E.Mey.

This name was accepted following an alternative taxonomy by these authorities:

• (2013). https://doi.org/10.24310/abm.v38i0. epublication. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• (2023). https://doi.org/10.11646/phytotaxa.608.1. epublication. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Ebihara, A. (2016). The standard of ferns and lycophytes in Japan. Nihonsan shida shokubutsu hyojun zukan 1: 1-475. Gakken Plus, Tokyo. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Fraser-Jenkins, C.R. & Kandel, D.R. (2019). Ferns and Fern-Allies of Nepal 2: 1-446. Government of Nepal, Ministry of Forests and Environment, Department of Plant Resources. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Fraser-Jenkins, C.R. & Parris, B.S. (2020). Pteridophytes of Turkey - A revised check-list and their relationship to Europe and the West Himalaya. Indian Journal of Forestry 43: 263-284. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Fraser-Jenkins, C.R. & al. (2017). An Annotated Checklist of Indian Pteridophytes 1: 1-562. Dehra Dun : BSMPS. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Fraser-Jenkins, C.R., Shah, S.N. & Ullah, A. (2023). Ferns of Swat Revisited: 1-260. Bishen Singh Mahendra Pal Singh, Dehra Dun, India. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Gonggrijp, S. & al. (2021). Nova Flora Neerlandica, Lycopodiopsida & Polypodiopsida: 1-275. KNVV uitgeverij. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Güner, A., Kandemir, A., Menemen, Y., Yıldırım, H., Aslan, S., Ekşi, G., Güner, I. & Çimen, A.Ö. (eds.) (2018). Resimli Türkiye Florası (Illustrated Flora of Turkey) 2: 1-1054. ANG Vakfı Nezahat Gökyiğit Botanik Bahçesi Yayınları. İstanbul. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Hassler, M. & Muer, T. (2022). Flora Germanica: alle Farn- und Blütenpflanzen Deutschlands in Text und Bild 1: 1-864. Verlag Regionalkultur, Uberstadt-Weiher. [Cited as Asplenium trichomanes L. subsp. quadrivalens D.E.Mey..]
• Merryweather, J. (2020). Britain's Ferns. A field guide to the clubmosses, quillworts, horsetails and ferns of Great Britain and Ireland: 1-280. Princeton University Press. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Muer, T., Sauerbier, H. & Cabrara Calixto, F. (2020). Die Farn- und Blütenpflanzen Madeiras: 1-792. Verlag und Versandbuchhandlung Andreas Kleinsteuber. [Cited as Asplenium trichomanes L. subsp. quadrivalens D.E.Mey..]
• Prelli, R. & Boudrie, M. (2021). Les Fougères et plantes alliées d'Europe: 1-528. BIOTOPE. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Retief, E. & Meyer, N.L. (2017). Plants of the Free State inventory and identification guide. Strelitzia 38: 1-1236. National Botanical Institute, Pretoria. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Roskov Y. & al. (eds.) (2018). World Ferns: Checklist of Ferns and Lycophytes of the World. Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Roux, J.P. (2016). The Lycopods and Ferns of Drakensberg and Lesotho: 1-384. Briza academic books, Pretoria, South Africa. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• Stace, C. (2019). New Flora of the British Isles ed. 4: 1-1266. C & M Floristics. [Cited as Asplenium trichomanes subsp. quadrivalens.]
• de Salas, MF, Baker, ML (2022). A Census of the Vascular Plants of Tasmania, including Macquarie Island: 1-161. Tasmanian Herbarium, Tasmanian Museum and Art Gallery, Hobart. https://flora.tmag.tas.gov.au/resources/census/. [Cited as Asplenium trichomanes subsp. quadrivalens.]