Lomaridium is a genus of ferns in the family Blechnaceae, subfamily Blechnoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). The genus is accepted in a 2016 classification of the family Blechnaceae, but other sources sink it into a very broadly defined Blechnum, equivalent to the whole of the PPG I subfamily.
Species , using the PPG I classification system, the Checklist of Ferns and Lycophytes of the World accepted the following sixteen species:
Lomaridium acutum (Desv.) Gasper & V.A.O.Dittrich Lomaridium angustifolium (Kunth) Vicent & G.Y Galán Lomaridium attenuatum (Sw.) Gasper & V.A.O.Dittrich Lomaridium biforme (Baker) Gasper & V.A.O.Dittrich Lomaridium binervatum (Poir.) Gasper & V.A.O.Dittrich Lomaridium bonapartei (Rakotondr.) Gasper & V.A.O.Dittrich Lomaridium contiguum (Mett.) Gasper & V.A.O.Dittrich Lomaridium dendrophilum (Sodiro) Gasper & V.A.O.Dittrich Lomaridium ensiforme (Liebm.) Gasper & V.A.O.Dittrich Lomaridium fragile (Liebm.) Gasper & V.A.O.Dittrich Lomaridium fuscosquamosum (A.Rojas) Gasper & V.A.O.Dittrich Lomaridium nigrocostatum (A.Rojas) Gasper & V.A.O.Dittrich Lomaridium pteropus (Kunze) Gasper & V.A.O.Dittrich Lomaridium schottii (Colla) Gasper & V.A.O.Dittrich Lomaridium simillimum (Baker) Gasper & V.A.O.Dittrich Lomaridium xiphophyllum (Baker) Gasper & V.A.O.Dittrich
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