Perrie, L.R. & Parris, B.S. (2012), Chloroplast DNA sequences indicate the grammitid ferns (Polypodiaceae) in New Zealand belong to a single clade, Notogrammitis gen. nov. New Zealand Journal of Botany 50(4): 467-468 [comb. nov.]

basionym: Polypodium crassium Kirk legitimate taxonomic synonym: Grammitis nana Brack. legitimate taxonomic synonym: Polypodium australe var. minutum F.Muell. legitimate taxonomic synonym: Grammitis pumila J.A.Armstr. nom. illeg. taxonomic synonym: Grammitis australis var. nana Franch. legitimate taxonomic synonym: Polypodium billardierei f. nana (Franch.) Skottsb. legitimate taxonomic synonym: Grammitis billardierei f. nana (Franch.) de la Sota legitimate taxonomic synonym: Grammitis armstrongii Tindale legitimate taxonomic synonym: Grammitis kerguelensis Tardieu legitimate

Council of Heads of Australasian Herbaria (2016), Australian Plant Census: - APC [secondary reference]

nomenclatural synonym: Polypodium crassium Kirk legitimate taxonomic synonym: Grammitis nana Brack. legitimate taxonomic synonym: Polypodium australe var. minuta F.Muell. orth. var. taxonomic synonym: Polypodium australe var. minutum F.Muell. legitimate taxonomic synonym: Grammitis pumila J.A.Armstr. nom. illeg. taxonomic synonym: Grammitis australis var. nana Franch. legitimate taxonomic synonym: Polypodium billardierei f. nana (Franch.) Skottsb. legitimate taxonomic synonym: Grammitis billardierei f. nana (Franch.) de la Sota legitimate taxonomic synonym: Grammitis armstrongii Tindale legitimate taxonomic synonym: Grammitis kerguelensis Tardieu legitimate misapplication: Grammitis poeppigiana (Mett.) Pic.Serm. legitimate by Entwisle, T.J. in Walsh, N.G. & Entwisle, T.J. (ed.) (1994), Ferns and Allied Plants. Flora of Victoria Edn. 1, 2: 66, Fig. 14l-m

• APC Dist.: NSW, Vic, Tas, MI

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): 90 [secondary reference]

nomenclatural synonym: Polypodium crassium Kirk legitimate

---