Dodatak:Popis Smeđe alge, P
Izgled
- Pachydictyon J.Agardh, 1894
- Padina Adanson, 1763
- Padinella Areschoug, 1843
- Palaeohalidrys N.L.Gardner, 1924
- Papenfussiella Kylin, 1940
- Pelagophycus Areschoug, 1881
- Pelvetia Decaisne & Thuret, 1845
- Pelvetiopsis N.L.Gardner, 1910
- Perisporochnus V.J.Chapman, 1954
- Perithalia J.Agardh, 1890
- Petalonia Derbès & Solier, 1850
- Petroderma Kuckuck, 1897
- Petrospongiaceae
- Petrospongium Nägeli ex Kützing, 1858
- Phaeogloea Chodat, 1922
- Phaeophyceae incertae sedis
- Phaeophysema A.Tanaka, S.Uwai & H. Kawai, 2010
- Phaeosaccion
- Phaeosaccion Farlow, 1882
- Phaeosaccionaceae
- Phaeoschizochlamys Lemmermann, 1898
- Phaeosiphoniella R.G.Hooper, E.C.Henry & R.Kuhlenkamp, 1988
- Phaeosiphoniellaceae
- Phaeostroma Kuckuck, 1893
- Phaeostromatella P.[J.L.] Dangeard, 1970
- Phaeostrophiaceae
- Phaeostrophion Setchell & Gardner, 1924
- Phaeothamniaceae Hansgirg, 1886
- Phaeothamniales
- Phaeothamnion G.Lagerheim, 1884
- Phaeurus Skottsberg, 1907
- Phloiocaulon Geyler, 1866
- Phycocelis Strömfelt, 1888
- Phyllariaceae Hamel ex Petrov, 1974
- Phyllariella Y.E.Petrov & Vozzhinskaja, 1966
- Phyllariopsis E.C.Henry & G.R.South, 1987
- Phyllospora C.Agardh, 1839
- Pilayellaceae
- Pilinia Kützing, 1843
- Pilocladus Kornmann, 1954
- Platysiphon Wilce, 1962
- Platythalia Sonder, 1845
- Pleurochloridellales
- Pleurocladia A.Braun, 1855
- Pleurophycus Setchell & Saunders ex J.Tilden, 1900
- Podochrysis Magne, 1975
- Pogotrichiaceae
- Pogotrichium
- Pogotrichum Reinke, 1892
- Polycerea J.Agardh, 1882
- Polycladia Montagne, 1847
- Polyschidea Stackhouse, 1809
- Porterinema Waern, 1952
- Postelsia Ruprecht, 1852
- Proselachista Y.P.Lee & Garbary, 1999
- Protasperococcus Sauvageau, 1931
- Protectocarpus Kornmann, 1955
- Protohalopteris Draisma, Prud'homme & H.Kawai, 2010
- Pseudochorda Yamada, Tokida & Inagaki, 1958
- Pseudochordaceae
- Pseudolessonia G.Y.Cho, N.G.Klochkova, T.N.Krupnova & Boo, 2006
- Pseudolithoderma Svedelius, 1911
- Pterygophora Ruprecht, 1852
- Ptilopogon Reinke, 1890
- Punctaria Greville, 1830
- Punctariaceae
- Pylaiella Bory de Saint-Vincent, 1823
- Pylaiellaceae