Adenophorus is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). The genus is endemic to Hawaii.Ranker, T. A. (1992). Adenophorus x carsonii hyb. nov. (Grammitidaceae): A new endemic hybrid from the island of Hawaii. Novon 2:4 408-10.Ranker, T. A., et al. (2003). Molecular phylogenetics and evolution of the endemic Hawaiian genus Adenophorus (Grammitidaceae). Molecular Phylogenetics and Evolution 26 337-47.

Species , the Checklist of Ferns and Lycophytes of the World accepted the following eleven species and two hybrids: Adenophorus × abbottiae W.H.Wagner Adenophorus abietinus (D.C.Eaton) K.A.Wilson Adenophorus × carsonii Ranker Adenophorus epigaeus (L.E.Bishop) W.H.Wagner Adenophorus haalilioanus (Brack.) K.A.Wilson Adenophorus hymenophylloides (Kaulf.) Hook. & Grev. Adenophorus montanus (Hillebr.) W.H.Wagner Adenophorus oahuensis (Copel.) L.E.Bishop Adenophorus periens L.E.Bishop Adenophorus pinnatifidus Gaudich. Adenophorus tamariscinus (Kaulf.) Hook. & Grev. Adenophorus tenellus (Kaulf.) Ranker Adenophorus tripinnatifidus Gaudich.

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