Ptilonia

{{Short description|Genus of algae}}

{{use dmy dates|date=July 2020}}

{{Automatic taxobox

|image = Ptilonia_willana_Lindauer_(AM_AK295881).jpg

|image_caption = Ptilonia willana (ASM AK295881)

|parent_authority =

|taxon = Ptilonia

|authority = (Harvey) J. Agardh, 1863

|subdivision_ranks = Species

|subdivision = See text

|type_species = Ptilonia magellanica

|type_species_authority = (Montagne) J.Agardh

}}

Ptilonia (Harvey) J. Agardh, 1863 is a genus of red algae in the family Bonnemaisoniaceae.{{cite journal|author=Agardh, J.G. |date=1863|title=Ptilonia|journal= Species Genera et Ordines Algarum, Seu Descriptiones Succinctae Specierum, Generum et Ordinum, Quibus Algarum Regnum Constituitur. Volumen Secundum: Algas Florideas Complectens|issue= 3|volume=2|pages=787–1138, 1158-1291|url=https://www.biodiversitylibrary.org/page/1200983}}{{AlgaeBase genus|name=Ptilonia|id=41424}}