Lemmaphyllum is a genus of ferns in the family Polypodiaceae, subfamily Microsoroideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I).

[2] Lemmaphyllum was first described by Carl Presl in 1851.

[1] A molecular phylogenetic study in 2019 suggested that Lemmaphyllum was one of a group of closely related genera in the subfamily Microsoroideae; a group the authors termed "Lepisorus sensu lato".

[3] Lemmaphyllum Lepidomicrosorium + Neocheiropteris + Neolepisorus + Tricholepidium Lepisorus s.s. Paragramma (as Lepisorus longifolius) As of February 2020[update], the Checklist of Ferns and Lycophytes of the World recognized the following species:[1] Plants of the World Online also accepted Lemmaphyllum accedens (Blume) Donk, which the Checklist of Ferns and Lycophytes of the World placed in Lepisorus.

This Polypodiaceae-related article is a stub.