''Polyphlebium angustatum'' is a species of

fern The ferns (Polypodiopsida or Polypodiophyta) are a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. They differ from mosses by being vascular, i.e., having specialized tissue ...

in the family Hymenophyllaceae. It is found in South America and on a number of Atlantic islands, including

Tristan da Cunha Tristan da Cunha (), colloquially Tristan, is a remote group of volcano, volcanic islands in the South Atlantic Ocean. It is one of three constituent parts of the British Overseas Territories, British Overseas Territory of Saint Helena, Ascensi ...

. The genus '' Polyphlebium'' is accepted in the

Pteridophyte Phylogeny Group The Pteridophyte Phylogeny Group (PPG) is an informal international group of systematic botanists who collaborate to establish on the classification of pteridophytes ( lycophytes and ferns) that reflects knowledge about plant relationships discove ...

classification of 2016 (PPG I), but not by other sources. , ''

Plants of the World Online Plants of the World Online (POWO) is an online taxonomic database published by the Royal Botanic Gardens, Kew. History Following the Convention on Biological Diversity, the Royal Botanic Gardens in Kew launched Plants of the World Online i ...

'' sank the genus into a broadly defined '' Trichomanes'', treating this species as ''Trichomanes angustatum''.

References

Flora of Southern America Flora of Tristan da Cunha Hymenophyllales Least concern plants Taxonomy articles created by Polbot Taxobox binomials not recognized by IUCN {{Polypodiidae-stub