Phylum: Chlorophyta
Class: Trebouxiophyceae
Order: Prasiolales
Family: Prasiolaceae
- Mariprasiola meridionalis (Setchell & N.L.Gardner) Heesch, Guiry & Rindi Emerald carpet
- Prasiola borealis M. Reed Northern emerald carpet
- Rosenvingiella polyrhiza (Rosenvinge) P.C.Silva Green rock scum
Class: Ulvophyceae
Order: Bryopsidales
Family: Codiaceae
- Codium fragile subsp. californicum (J.Agardh) Maggs & J.Kelly Sea staghorn
- Codium ritteri Setchell & N.L.Gardner Coarse spongy cushion
- Codium setchellii N.L.Gardner Smooth spongy cushion
Family: Derbesiaceae
- Derbesia sp. Green sea grape
Order: Cladophorales
Family: Cladophoraceae
- Chaetomorpha melagonium (F.Weber & Mohr) Kützing Coarse green sea hair
- Chaetomorpha sp. Curly sea hair
- Cladophora sericea (Hudson) Kützing Graceful green hair
Order: Ulotrichales
Family: Monostromataceae
- Monostroma sp. Sea cellophane
Family: Ulotrichaceae
- Acrosiphonia arcta (Dillwyn) Gain Arctic sea moss
- Acrosiphonia coalita (Ruprecht) Scagel, Garbary, Golden & M.W.Hawkes Green rope
- Acrosiphonia duriuscula (Ruprecht) Yendo Northern green rope
- Acrosiphonia sonderi (Kützing) Kornmann Coarse sea moss
- Acrosiphonia sp. Sea moss
- Protomonostroma undulatum (Wittrock) K.L.Vinogradova Ephemeral spring blade
- Pseudothrix borealis Hanic & S.C.Lindstrom False northern thread
- Ulothrix flacca (Dillwyn) Thuret Mermaid's tresses
- Urospora neglecta (Kornmann) Lokhorst & Trask Northern sea hair
- Urospora wormskioldii (Mertens ex Hornemann) Rosenvinge Jade necklace
Order: Ulvales
Family: Kornmanniaceae
- Blidingia sp. Dwarf sea hair
- Kornmannia leptoderma (Kjellman) Bliding Seagrass cellophane
Family: Ulvaceae
- Ulva fenestrata Postels & Ruprecht Sea lettuce
- Ulva intestinalis Linnaeus Sea hair
- Ulva pouliotii Golden & S.C.Lindstrom Pouliot’s sea hair
- Ulva prolifera O.F.Müller Branched string lettuce
- Ulva smaragdina (Kützing) Hughey, Maggs, L.M.Loos, S.A.Harris & P.W.Gabrielson Green string lettuce
- Ulvaria blyttii (Areschoug) K.L.Vinogradova Dark sea lettuce
Phylum: Ochrophyta
Class: Bacillariophyceae
- Diatom mats
Class: Phaeophyceae
Order: Chordales
Family: Chordaceae
- Chorda borealis H.Kawai, T.Hanyuda & G.W.Saunders Spaghetti kelp
Order: Desmarestiales
Family: Desmarestiaceae
- Desmarestia aculeata (Linnaeus) J.V.Lamouroux Witch's hair
- Desmarestia herbacea (Turner) J.V.Lamouroux Giant flattened acid kelp
- Desmarestia ligulata (Stackhouse) J.V.Lamouroux Flattened acid kelp
- Desmarestia viridis (O.F.Müller) J.V.Lamouroux Stringy acid kelp
Order: Ectocarpales
Family: Acinetosporaceae
- Pylaiella sp. Sea felt
Family: Chordariaceae
- Acrothrix gracilis Kylin Graceful golden seaweed
- Chordaria chordaeformis (Kjellman) H.Kawai & S.-H.Kim Stringy chocolate pencils
- Chordaria flagelliformis (O.F.Müller) C.Agardh Chocolate pencils
- Coilodesme bulligera Strömfelt Sea chip
- Coilodesme californica (Ruprecht) Kjellman Bladder chain epiphyte
- Coilodesme fucicola (Yendo) Nagai Kelp fringe
- Dictyosiphon sinicola N.L.Gardner Golden sea hair
- Elachista sp. Rockweed tuft
- Eudesme borealis H.Kawai, T.Hanyuda & A.F.Peters Gooey golden seaweed
- Haplogloia andersonii (Farlow) Levring Anderson's gooey brown
- Leathesia marina (Lyngbye) Decaisne Sea cauliflower
- Punctaria lobata (D.A.Saunders) Setchell & N.L.Gardner Eelgrass brown blade
- Saundersella simplex (D.A Saunders) Kylin Golden bottlebrush epiphyte
- Soranthera ulvoidea Postels & Ruprecht Studded sea balloons
- Sphaerotrichia divaricata (C.Agardh) Kylin Firm seagrass epiphyte
Family: Ectocarpaceae
- Ectocarpus siliculosus complex False sea felt
Family: Scytosiphonaceae
- Colpomenia peregrina Sauvageau Bulb seaweed
- Dactylosiphon bullosus (D.A.Saunders) Santiañez, K.M.Lee, S.M.Boo & Kogame Sea rubber
- Melanosiphon intestinalis (D.A.Saunders) M.J.Wynne Twisted sea tubes
- Petalonia sp. False kelp
- Scytosiphon lomentaria (Lyngbye) Link Soda straws
Order: Fucales
Family: Fucaceae
- Fucus distichus Linnaeus Rockweed
- Fucus distichus (dwarf form) Linnaeus Dwarf rockweed
- Fucus spiralis Linnaeus Spiral popweed
Family: Sargassaceae
- Sargassum muticum (Yendo) Fensholt Wireweed
- Stephanocystis geminata (C.Agardh) Draisma, Ballesteros, F.Rousseau & T.Thibaut Northern bladder chain
Order: Laminariales
Family: Agaraceae
- Agarum clathratum Dumortier Sieve kelp
- Agarum turneri Postels & Ruprecht Smooth sieve kelp
- Costaria costata (C.Agardh) D.A.Saunders Five-ribbed kelp
- Neoagarum fimbriatum (Harvey) H.Kawai & T.Hanyuda Fringed sieve kelp
- Thalassiophyllum clathrus (S.G.Gmelin) Postels & Ruprecht Spiral sieve kelp
Family: Alariaceae
- Alaria marginata Postels & Ruprecht Ribbon kelp
- Eualaria fistulosa (Postels & Ruprecht) M.J.Wynne Dragon kelp
- Lessoniopsis littoralis (Farlow & Setchell ex Tilden) Reinke Flat pompom kelp
- Pleurophycus gardneri Setchell & D.A.Saunders ex Tilden Broad-ribbed kelp
- Pterygophora californica Ruprecht Woody-stemmed kelp
Family: Arthrothamnaceae
- Cymathaere triplicata (Postels & Ruprecht) J.Agardh Three-ribbed kelp
- Egregia menziesii (Turner) Areschoug Feather boa kelp
Family: Aureophycaceae
- Aureophycus aleuticus H.Kawai, T.Hanyuda, M.Lindeberg, & S.C.Lindstrom Golden V kelp
Family: Laminariaceae
- Hedophyllum dentigerum (Kjellman) Starko, S.C.Lindstrom & Martone Northern stiff-stiped kelp
- Hedophyllum nigripes (J.Agardh) Starko, S.C.Lindstrom & Martone Split kelp
- Hedophyllum sessile (C.Agardh) Setchell Sea cabbage
- Laminaria repens Ruprecht Northern rhizome kelp
- Laminaria setchellii P.C.Silva Southern stiff-stiped kelp
- Laminaria solidungula J.Agardh Arctic suction-cup kelp
- Laminaria yezoensis Miyabe Suction-cup kelp
- Macrocystis tenuifolia Postels & Ruprecht Giant kelp
- Nereocystis luetkeana (K.Mertens) Postels & Ruprecht Bull kelp
- Saccharina latissima (Linnaeus) C.E.Lane, C.Mayes, Druehl & G.W.Saunders Sugar kelp
Order: Ralfsiales
Family: Ralfsiaceace
- Ralfsia fungiformis (Gunnerus) Setchell & N.L.Gardner Sea fungus
Family: Ralfsiaceae
- Analipus filiformis (Ruprecht) Papenfuss Coarse brown curls
- Analipus japonicus (Harvey) M.J.Wynne Bottlebrush seaweed
Order: Sphacelariales
Family: Phaeostrophiaceae
- Phaeostrophion irregulare Setchell & N.L.Gardner Surf-loving false kelp
Family: Sphacelariaceae
- Sphacelaria rigidula Kützing Brown sea moss
Phylum: Rhodophyta
Class: Bangiophyceae
Order: Bangiales
Family: Bangiaceae
- "Bangia" spp. Black sea-hair
- Boreophyllum aestivale (S.C.Lindstrom & Fredericq) S.C.Lindstrom Summer laver
- Fuscifolium papenfussii (V.Krishnamurthy) S.C.Lindstrom Eastern dark laver
- Fuscifolium tasa (Yendo) S.C.Lindstrom Western dark laver
- Pyropia abbottiae (V.Krishnamurthy) S.C.Lindstrom Black seaweed
- Pyropia fallax (S.C.Lindstrom & K.M.Cole) S.C.Lindstrom False laver
- Pyropia fucicola (V.Krishnamurthy) S.C.Lindstrom Rockweed laver
- Pyropia gardneri (G.M.Smith & Hollenberg) S.C.Lindstrom Kelp laver
- Pyropia nereocystis (C.L.Anderson) S.C.Lindstrom Bull Kelp laver
- Pyropia perforata (J.Agardh) S.C.Lindstrom Purple laver
- Pyropia pseudolanceolata (V.Krishnamurthy) S.C.Lindstrom Olive green winter laver
- Pyropia taeniata S.C.Lindstrom Long laver
- Wildemania amplissima (Kjellman) Foslie Red cellophane
- Wildemania norrisii (V.Krishnamurthy) S.C.Lindstrom Norris' laver
- Wildemania variegata (Kjellman) De Toni Kjellman's laver
Class: Compsopogonophyceae
Order: Erythropeltidales
Family: Erythrotrichiaceae
- Smithora naiadum (C.L.Anderson) Hollenberg Seagrass laver
Class: Florideophyceae
Order: Acrochaetiales
Family: Rhodochortonaceae
- Rhodochorton purpureum (Lightfoot) Rosenvinge Red sea moss
Order: Ahnfeltiales
Family: Ahnfeltiaceae
- Ahnfeltia fastigiata (Endlicher) Makienko Bushy ahnfelt's seaweed
Order: Bangiales
Family: Bangiaceae
- Pyropia kurogii (S.C.Lindstrom) S.C.Lindstrom Split spring laver
- Pyropia torta (V.Krishnamurthy) S.C.Lindstrom Teal nori
- Pyropia unabbottiae S.C.Lindstrom False black seaweed
Order: Bonnemaisoniales
Family: Bonnemaisoniaceae
- Pleuroblepharidella japonica (Okamura) M.J.Wynne False sea brush
Order: Ceramiales
Family: Callithamniaceae
- Callithamnion pikeanum Harvey Beauty bush
Family: Ceramiaceae
- Antithamnion defectum Kylin Dwarf skein
- Antithamnionella pacifica (Harvey) E.M.Wollaston Hooked skein
- Ceramothamnion pacificum (Collins) M.J.Wynne & C.W.Schneider Staghorn felt
- Herpochondria borealis (Ruprecht) Barros-Barreto & Maggs Coarse sea lace
- Scagelia occidentalis (Kylin) E.M.Wollaston Scagel's skein
Family: Delesseriaceae
- Cryptopleura ruprechtiana (J.Agardh) Kylin Hidden rib
- Cumathamnion decipiens (J.Agardh) M.J.Wynne & G.W.Saunders Winged rib
- Loranthophycus sp. Red feathered seaweed
- Membranoptera spinulosa (Ruprecht) Kuntze Bering membrane wing
- Mikamiella ruprechtiana (Zinova) M.J.Wynne Mikami's sea oak
- Nienburgia sp. prolifera M.J.Wynne Northern toothed wing
- Phycodrys fimbriata (Kuntze) Kylin Common sea oak
- Polyneura latissima (Harvey) Kylin Crisscross network
- Tokidadendron bullatum (N.L.Gardner) M.J.Wynne Northern sea oak
Family: Rhodomelaceae
- Neorhodomela aculeata (Perestenko) Masuda Graceful black pine
- Neorhodomela larix (Turner) Masuda Black pine
- Neorhodomela oregona (Doty) Masuda Oregon pine
- Odonthalia comosa (Setchell & N.L.Gardner) G.W.Saunders & C.W.Schneider Rockweed brush
- Odonthalia floccosa (Esper) Falkenberg Sea brush
- Odonthalia kamtschatica (Ruprecht) J.Agardh Flattened sea brush
- Odonthalia setacea (Ruprecht) Perestenko Russian sea brush
- Osmundea spectabilis (Postels & Ruprecht) K.W.Nam Sea laurel
- Polysiphonia pacifica var. pacifica Hollenberg Pretty polly
- Savoiea bipinnata (Postels & Ruprecht) M.J.Wynne Black tassel
- Savoiea hamata (E.S.Zinova) M.J.Wynne Subtidal tassel
Family: Wrangeliaceae
- Pleonosporium vancouverianum (J.Agardh) Setchell & N.L.Gardner Alternate skein
- Ptilota asplenioides (Esper) C.Agardh Sea fern
- Ptilota serrata Kützing Northern sea fern
- Tokidaea chilkatensis S.C.Lindstrom & M.J.Wynne Tokida's red felted skein
Order: Corallinales
Family: Corallinaceae
- Bossiella frondescens (Postels & Ruprecht) E.Y.Dawson Enigmatic coral seaweed
- Corallina officinalis Linnaeus Chalky coral seaweed
- Corallina vancouveriensis Yendo Graceful coral seaweed
- Johansenia macmillanii (Yendo) K.R.Hind & G.W.Saunders Macmillan's coral seaweed
Order: Corallinales & Hapalidiales
Family: Corallinaceae & Hapalidiaceae
- Coralline crusts Calcareous crusts
Order: Gigartinales
Family: Dumontiaceae
- Constantinea rosa-marina (S.G.Gmelin) Postels & Ruprecht Cup and saucer
- Constantinea simplex Setchell Simple saucer
- Constantinea subulifera Setchell Cracked saucer
- Cryptosiphonia woodii (J.Agardh) J.Agardh Bleached brunette
- Dilsea californica (J.Agardh) Kuntze California red blade
- Dumontia alaskana V.Tai, S.C.Lindstrom & G.W.Saunders Purple pencils
- Dumontia simplex Cotton Ephemeral spring tubes
- Farlowia mollis (Harvey & Bailey) Farlow & Setchell Farlow's seaweed
- Neodilsea borealis (I.A.Abbott) S.C.Lindstrom Northern red blade
Family: Endocladiaceae
- Endocladia muricata (Endlicher) J.Agardh Black sea moss
- Gloiopeltis furcata (Postels & Ruprecht) J.Agardh Jelly moss
Family: Furcellariaceae
- Opuntiella californica (Farlow) Kylin Red Opuntia
- Turnerella mertensiana (Postels & Ruprecht) F.Schmitz Red sea-cabbage
Family: Gigartinaceae
- Chondracanthus exasperatus (Harvey & Bailey) Hughey Turkish towel
- Mazzaella parksii (Setchell & N.L.Gardner) Hughey, P.C.Silva & Hommersand Iridescent horn-of-plenty
- Mazzaella parvula (Kjellmann) P.W.Gabrielson, S.C.Lindstrom, Hughey & Hammersand Small northern mazza weed
- Mazzaella phyllocarpa (Postels & Ruprecht) Perestenko Northern mazza weed
- Mazzaella splendens (Setchell & N.L. Gardner) Fredericq Splendid iridescent seaweed
Family: Gloiosiphoniaceae
- Gloiosiphonia capillaris (Hudson) Carmichael Red capillary seaweed
Family: Kallymeniaceae
- Callophyllis spp. Red Sea fan
- Euthora cristata (C.Agardh) J.Agardh Delicate northern sea fan
- Hommersandia maximicarpa G.I.Hansen & S.C.Lindstrom Hommersand's seaweed
- Kallymeniopsis spp. Russian red blade
Family: Nemaliaceae
- Dudresnaya sp. False soft coral
Family: Phyllophoraceae
- Coccotylus truncatus (Pallas) M.J.Wynne & J.N.Heine Arctic false Opuntiella
- Mastocarpus alaskensis S.C.Lindstrom, Hughey & Martone Turkish washcloth
- Mastocarpus latissimus (Harvey) S.C.Lindstrom, Hughey & Martone Harvey's Turkish washcloth
- Mastocarpus pacificus (Kjellman) Perestenko Northern Turkish washcloth
- Mastocarpus rigidus S.C.Lindstrom, Hughey & Martone Narrow Turkish washcloth
- Mastocarpus spp. (Petrocelis phase) Tar spot alga
Family: Solieriaceae
- Sarcodiotheca gaudichaudii (Montagne) P.W.Gabrielson False sea spaghetti
Order: Halymeniales
Family: Halymeniaceae
- Grateloupia californica Kylin Spiny red bottlebrush
- Prionitis sternbergii (C.Agardh) J.Agardh Bleachweed
Order: Hapalidiales
Family: Hapalidiaceae
- Boreolithothamnion soriferum (Kjellman) P.W.Gabrielson, Maneveldt, Hughey & V.Peña Rhodoliths
- Clathromorphum nereostratum Lebednik Thick rock crust
- Neopolyporolithon articum (Kjellman) P.W.Gabrielson, S.C.Lindstrom & Hughey Arctic coralline crust
- Neopolyporolithon reclinatum (Foslie) W.H.Adey & H.W.Johansen Coralline disc
Order: Hildenbrandiales
Family: Hildenbrandiaceae
- Hildenbrandia rubra (Sommerfelt) Meneghini Rusty rock
Order: Nemaliales
Family: Nemaliaceae
- Nemalion sp. Rubber threads
Order: Nemastomatales
Family: Schizymeniaceae
- Schizymenia pacifica (Kylin) Kylin Slippery red blade
Order: Palmariales
Family: Palmariaceae
- Devaleraea callophylloides (M.W.Hawkes & Scagel) G.W.Saunders, C.J.Jackson & Salomaki Frilly red ribbon
- Devaleraea firma (Postels & Ruprecht) Selivanova Flattened sea sac
- Devaleraea mollis (Setchell & N.L.Gardner) G.W.Saunders, C.J.Jackson & Salomaki Red ribbon
- Halosaccion fucicola Postels & Ruprecht Sea sac
- Halosaccion glandiforme (S.G.Gmelin) Ruprecht High intertidal sea sac
- Halosaccion sp. undesribed Ephemeral sea sac
- Palmaria hecatensis M.W.Hawkes Stiff red ribbon
- Palmaria sp. Alaskan False Dulse
Order: Plocamiales
Family: Plocamiaceae
- Plocamium pacificum Kylin Sea comb
Order: Rhodymeniales
Family: Rhodymeniaceae
- Lukinea dissecta Perestenko Northern fan
- Sparlingia pertusa (Postels & Ruprecht) G.W.Saunders, I.M.Strachan & Kraft Red eyelet silk
Phylum: Anthophyta
Class: Liliopsida
Order: Alismatales
Family: Zosteraceae
- Phyllospadix scouleri W.J.Hooker Scouler's surfgrass
- Phyllospadix serrulatus Ruprecht ex Ascherson Serrulated surfgrass
- Zostera marina Linnaeus Eelgrass
Phylum: Heterokontophyta
Class: Phaeosacciophyceae
Order: Phaeosacciales
Family: Phaeosacciaceae
- Phaeosaccion collinsii Farlow Gooey sea sac
Phylum: Magnoliophyta
- Flowering meadow
Class: Eudicotyledons
Order: Caryophyllales
Family: Caryophyllaceae
- Honckenya peploides (L.) Ehrh. Beach greens
Class: Liliopsida
Order: Cyperales
Family: Cyperaceae
- Carex spp. Hornem. Sedge species
Family: Poaceae
- Puccinellia spp. Alkali grass
Class: Rosids
Order: Fabales
Family: Fabaceae
- Lupinus nootkatensis Donn ex Sims Lupine
Phylum: Ascomycota
Class: Eurotiomycetes
Order: Verrucariales
Family: Verrucariaceae
- Hydropunctaria maura and other Verrucaria-like species (Wahlenberg) C.Keller, Gueidan & Thüs Black seaside lichen
Class: Lecanoromycetes
Order: Pertusariales
Family: Coccotremataceae
- Coccotrema maritimum Brodo White seaside lichen
Order: Teloschistales
Family: Teloschistinaceae
- Caloplaca spp. and Xanthoria spp. Orange sea side lichens
Phylum: Magnoliophyta
Class: Magnoliopsida
Order: Apiales
Family: Apiaceae
- Heracleum lanatum Bartr. Cow parsnip
Order: Asterales
Family: Asteraceae
- Achillea millefolium L. Yarrow
- Senecio pseudo-arnica Less. Seashore sunflower
Order: Brassicales
Family: Brassicaceae
- Cochlearia officinalis L. Scurvey weed
Order: Caryophyllales
Family: Chenopodiaceae
- Salicornia virginica Beach asparagus
Order: Cyperales
Family: Poaceae
- Leymus mollis (Trin.) Pilger Dunegrass
Order: Ericales
Family: Ericaceae
- Rhododendron camtschaticum Pall. Kamchatka rhododendron
Order: Fabales
Family: Fabaceae
- Lathyrus japonicus (L.) Kartesz & Gandhi Beach pea
Order: Geraniales
Family: Geraniaceae
- Geranium erianthum Wild geranium
Order: Lamiales
Family: Boraginaceae
- Mertensia maritima (L.) S.F.Gray Oysterleaf
Order: Liliales
Family: Liliaceae
- Fritillaria camschatcensis (L.) Ker. Chocolat lilly
Order: Plantaginales
Family: Plantaginaceae
- Plantago maritima L. Goose-tongue
Order: Ranunculales
Family: Ranunculaceae
- Aconitum maximum Pall. Monkshood
Order: Rosales
Family: Crassulaceae
- Rhodiola integrifolia Raf. Roseroot
Family: Rosaceae
- Potentilla villosa Pallas ex Pursh Cinquefoil
Order: Scrophulariales
Family: Scrophulariaceae
- Mimulus guttatus De Candolle Monkeyflower
Phylum: Chlorophyta
Class: Chlorophyceae
Order: Sphaeropleales
Family: Radiococcaceae
- Gloeocystis scopulorum Hansgirg
Class: Trebouxiophyceae
Order: Prasiolales
Family: Prasiolaceae
- Mariprasiola delicata (Setchell & N.L.Gardner) Heesch, Guiry & Rindi
- Mariprasiola meridionalis (Setchell & N.L.Gardner) Heesch, Guiry & Rindi Emerald carpet
- Prasiola borealis M. Reed Northern emerald carpet
- Prasiola crispa (Lightfoot) Kützing
- Rosenvingiella polyrhiza (Rosenvinge) P.C.Silva Green rock scum
- Vittaprasiola nr calophylla (Carmichael ex Greville) Heesch, Guiry & Rindi
Family: Stichococcaceae
- Stichococcus marinus (Wille) Hazen
Class: Ulvophyceae
Order: Bryopsidales
Family: Bryopsidaceae
- Bryopsis corticulans Setchell
Family: Codiaceae
- Codium fragile subsp. californicum (J.Agardh) Maggs & J.Kelly Sea staghorn
- Codium ritteri Setchell & N.L.Gardner Coarse spongy cushion
- Codium setchellii N.L.Gardner Smooth spongy cushion
Family: Derbesiaceae
- Derbesia sp. Green sea grape
Family: Ostreobiaceae
- Ostreobium queketti Bornet & Flahault
Order: Cladophorales
Family: Cladophoraceae
- Chaetomorpha brachygona Harvey
- Chaetomorpha cannabina (Areschoug) Kjellman
- Chaetomorpha melagonium (F.Weber & Mohr) Kützing Coarse green sea hair
- Chaetomorpha picquotiana Montagne ex Kützing
- Chaetomorpha sp. Curly sea hair
- Cladophora columbiana Collins
- Cladophora sericea (Hudson) Kützing Graceful green hair
- Lola lubrica (Setchell & N.L.Gardner) A.Hamel & Hamel
- Rhizoclonium riparium (Roth) Harvey
- Rhizoclonium tortuosum (Dillwyn) Kützing
Order: Ulotrichales
Family: Chlorocystidaceae
- Chlorocystis moorei (N.L. Gardner) Darienko et al.
Family: Gayraliaceae
- Gayralia oxysperma (Kützing) K.L.Vinogradova ex Scagel et al.
Family: Gomontiaceae
- Collinsiella tuberculata Setchell & N.L.Gardner
- Eugomontia sacculata Kornmann
Family: Monostromataceae
- Monostroma sp. Sea cellophane
Family: Ulotrichaceae
- Acrosiphonia arcta (Dillwyn) Gain Arctic sea moss
- Acrosiphonia coalita (Ruprecht) Scagel, Garbary, Golden & M.W.Hawkes Green rope
- Acrosiphonia duriuscula (Ruprecht) Yendo Northern green rope
- Acrosiphonia sonderi (Kützing) Kornmann Coarse sea moss
- Acrosiphonia sp. Sea moss
- Protomonostroma undulatum (Wittrock) K.L.Vinogradova Ephemeral spring blade
- Pseudothrix borealis Hanic & S.C.Lindstrom False northern thread
- Spongomorpha aeruginosa (Linnaeus) Hoek
- Ulothrix flacca (Dillwyn) Thuret Mermaid's tresses
- Ulothrix subflaccida Wille
- Ulothrix zonata (Weber & Mohr) Kützing
- Urospora neglecta (Kornmann) Lokhorst & Trask Northern sea hair
- Urospora penicilliformis (Roth) Areschoug
- Urospora wormskioldii (Mertens ex Hornemann) Rosenvinge Jade necklace
Order: Ulvales
Family: Bolbocoleonaceae
- Bolbocoleon piliferum Pringsheim
Family: Kornmaniaceae
- Blidingia marginata (J.Agardh) P.J.L.Dangeard ex Bliding
- Blidingia subsalsa (Kjellman) Kornmann & Sahling ex Scagel et al.
Family: Kornmanniaceae
- Blidingia sp. Dwarf sea hair
- Kornmannia leptoderma (Kjellman) Bliding Seagrass cellophane
Family: Ulvaceae
- Ochlochaete hystrix Thwaites
- Percursaria percursa (C.Agardh) Rosenvinge
- Ulva californica Wille
- Ulva compressa Linnaeus
- Ulva fenestrata Postels & Ruprecht Sea lettuce
- Ulva intestinalis Linnaeus Sea hair
- Ulva nr "linza"
- Ulva pouliotii Golden & S.C.Lindstrom Pouliot’s sea hair
- Ulva prolifera O.F.Müller Branched string lettuce
- Ulva rigida C.Agardh
- Ulva smaragdina (Kützing) Hughey, Maggs, L.M.Loos, S.A.Harris & P.W.Gabrielson Green string lettuce
- Ulva splitiana Alongi, Cormaci & G.Furnari
- Ulva torta (Mertens) Trevisan
- Ulvaria blyttii (Areschoug) K.L.Vinogradova Dark sea lettuce
Family: Ulvellaceae
- Pseudopringsheimia confluens (Rosenvinge) Wille
- Ulvella setchellii P.J.L.Dangeard
Phylum: Heterokontophyta
Class: Phaeosacciophyceae
Order: Phaeosacciales
Family: Phaeosacciaceae
- Phaeosaccion collinsii Farlow Gooey sea sac
Phylum: Ochrophyta
Class: Bacillariophyceae
- Diatom mats
Class: Phaeophyceae
Order: Chordales
Family: Chordaceae
- Chorda borealis H.Kawai, T.Hanyuda & G.W.Saunders Spaghetti kelp
Order: Desmarestiales
Family: Desmarestiaceae
- Desmarestia aculeata (Linnaeus) J.V.Lamouroux Witch's hair
- Desmarestia herbacea (Turner) J.V.Lamouroux Giant flattened acid kelp
- Desmarestia herbaceae (Turner) J.V.Lamouroux
- Desmarestia kurilensis Yamada
- Desmarestia ligulata (Stackhouse) J.V.Lamouroux Flattened acid kelp
- Desmarestia viridis (O.F.Müller) J.V.Lamouroux Stringy acid kelp
Order: Dictyotales
Family: Dictyotaceae
- Dictyota binghamiae J.Agardh
Order: Ectocarpales
Family: Acinetosporaceae
- Feldmannia simplex (P.Crouan & H.Crouan) Hamel
- Hincksia ovata (Kjellman) P.C.Silva
- Hincksia sandriana (Zanardini) P.C.Silva
- Pylaiella sp. Sea felt
Family: Chordariaceae
- Acrothrix gracilis Kylin Graceful golden seaweed
- Chordaria chordaeformis (Kjellman) H.Kawai & S.-H.Kim Stringy chocolate pencils
- Chordaria flagelliformis (O.F.Müller) C.Agardh Chocolate pencils
- Chordaria gracilis Setchell & N.L.Gardner
- Chukchia pedicellata R.T.Wilce, P.M.Pedersen & Sekida
- Coilodesme bulligera Strömfelt Sea chip
- Coilodesme californica (Ruprecht) Kjellman Bladder chain epiphyte
- Coilodesme cystoseirae (Ruprecht) Setchell & N.L.Gardner
- Coilodesme fucicola (Yendo) Nagai Kelp fringe
- Coilodesme linearis D.A.Saunders
- Delamarea attenuata (Kjellman) Rosenvinge
- Dictyosiphon chordaria Areschoug
- Dictyosiphon sinicola N.L.Gardner Golden sea hair
- Elachista lubrica Ruprecht
- Elachista sp. Rockweed tuft
- Eudesme borealis H.Kawai, T.Hanyuda & A.F.Peters Gooey golden seaweed
- Haplogloia andersonii (Farlow) Levring Anderson's gooey brown
- Hecatonema lawsonii Setchell & N.L.Gardner
- Hecatonema terminale (Kützing) Kylin
- Laminariocolax tomentosoides (Farlow) Kylin
- Leathesia marina (Lyngbye) Decaisne Sea cauliflower
- Leptonematella fasciculata (Reinke) P.C.Silva
- Microspongium alariae (P.M.Pedersen) A.F.Peters
- Myriocladia lovenii J. Agardh
- Myrionema balticum (Reinke) Foslie
- Myrionema foecundum f. simplicissimum Setchell & N.L.Gardner
- Myrionema phyllophilum Setchell & N.L.Gardner
- Myrionema setiferum Setchell & N.L.Gardner
- Myrionema strangulans Greville
- Omphalophyllum ulvaceum Rosenvinge
- Phaeostroma pustulosum Kuckuck
- Punctaria chartacea Setchell & N.L.Gardner
- Punctaria lobata (D.A.Saunders) Setchell & N.L.Gardner Eelgrass brown blade
- Punctaria tenuissima (C.Agardh) Greville
- Saundersella simplex (D.A Saunders) Kylin Golden bottlebrush epiphyte
- Soranthera ulvoidea Postels & Ruprecht Studded sea balloons
- Sphaerotrichia divaricata (C.Agardh) Kylin Firm seagrass epiphyte
- Stictyosiphon soriferus (Reinke) Rosenvinge
- Stictyosiphon tortilis (Gobi) Areschoug ex Reinke
- Streblonema irregularis D.A.Saunders
- Streblonema minutissima D.A.Saunders
- Streblonema porphyrae Setchell & N.L.Gardner
- Streblonema vorax Setchell & N.L.Gardner
- Trachynema groenlandicum (S.Lund) P.M.Pedersen
Family: Ectocarpaceae
- Ectocarpus commensalis Setchell & N.L.Gardner
- Ectocarpus fasciculatus Harvey
- Ectocarpus flagelliferus Setchell & N.L.Gardner
- Ectocarpus siliculosus complex False sea felt
- Spongonema tomentosum (Hudson) Kützing
Family: Scytosiphonaceae
- Colpomenia borea Dy, M.Hoshino, T.Abe, Yotsukura, K.M.Lee, S.M.Boo, N.Klochkova & Kogame
- Colpomenia peregrina Sauvageau Bulb seaweed
- Compsonema tenue Setchell & N.L.Gardner
- Dactylosiphon bullosus (D.A.Saunders) Santiañez, K.M.Lee, S.M.Boo & Kogame Sea rubber
- Melanosiphon intestinalis (D.A.Saunders) M.J.Wynne Twisted sea tubes
- Petalonia arctica G.W.Saunders & C.W.Schneider
- Petalonia sp. False kelp
- Scytosiphon lomentaria (Lyngbye) Link Soda straws
Order: Fucales
Family: Fucaceae
- Fucus distichus Linnaeus Rockweed
- Fucus distichus (dwarf form) Linnaeus Dwarf rockweed
- Fucus spiralis Linnaeus Spiral popweed
Family: Sargassaceae
- Sargassum muticum (Yendo) Fensholt Wireweed
- Stephanocystis geminata (C.Agardh) Draisma, Ballesteros, F.Rousseau & T.Thibaut Northern bladder chain
Order: incertae sedis
Family: incertae sedis
- Sorapion kjellmanii (Wille) Rosenvinge
Order: Ishigeales
Family: Petrodermataceae
- Petroderma maculiforme (Wollny) Kuckuck
Order: Laminariales
Family: Agaraceae
- Agarum clathratum Dumortier Sieve kelp
- Agarum turneri Postels & Ruprecht Smooth sieve kelp
- Costaria costata (C.Agardh) D.A.Saunders Five-ribbed kelp
- Neoagarum fimbriatum (Harvey) H.Kawai & T.Hanyuda Fringed sieve kelp
- Thalassiophyllum clathrus (S.G.Gmelin) Postels & Ruprecht Spiral sieve kelp
Family: Alariaceae
- Alaria crispa Kjellman
- Alaria marginata Postels & Ruprecht Ribbon kelp
- Alaria taeniata Kjellman
- Eualaria fistulosa (Postels & Ruprecht) M.J.Wynne Dragon kelp
- Lessoniopsis littoralis (Farlow & Setchell ex Tilden) Reinke Flat pompom kelp
- Pleurophycus gardneri Setchell & D.A.Saunders ex Tilden Broad-ribbed kelp
- Pterygophora californica Ruprecht Woody-stemmed kelp
Family: Arthrothamnaceae
- Cymathaere triplicata (Postels & Ruprecht) J.Agardh Three-ribbed kelp
- Egregia menziesii (Turner) Areschoug Feather boa kelp
Family: Aureophycaceae
- Aureophycus aleuticus H.Kawai, T.Hanyuda, M.Lindeberg, & S.C.Lindstrom Golden V kelp
Family: Laminariaceae
- Hedophyllum dentigerum (Kjellman) Starko, S.C.Lindstrom & Martone Northern stiff-stiped kelp
- Hedophyllum druehlii (G.W.Saunders & McDevit) Starko, S.C.Lindstrom & Martone
- Hedophyllum nigripes (J.Agardh) Starko, S.C.Lindstrom & Martone Split kelp
- Hedophyllum sessile (C.Agardh) Setchell Sea cabbage
- Hedophyllum subsessile (Areschoug) Setchell
- Laminaria ephemera Setchell
- Laminaria repens Ruprecht Northern rhizome kelp
- Laminaria setchellii P.C.Silva Southern stiff-stiped kelp
- Laminaria solidungula J.Agardh Arctic suction-cup kelp
- Laminaria yezoensis Miyabe Suction-cup kelp
- Macrocystis tenuifolia Postels & Ruprecht Giant kelp
- Nereocystis luetkeana (K.Mertens) Postels & Ruprecht Bull kelp
- Saccharina latissima (Linnaeus) C.E.Lane, C.Mayes, Druehl & G.W.Saunders Sugar kelp
Order: Ralfsiales
Family: Ralfsiaceace
- Ralfsia fungiformis (Gunnerus) Setchell & N.L.Gardner Sea fungus
Family: Ralfsiaceae
- Analipus filiformis (Ruprecht) Papenfuss Coarse brown curls
- Analipus japonicus (Harvey) M.J.Wynne Bottlebrush seaweed
- Ralfsia ovata Rosenvinge
- Ralfsia pacifica Hollenberg
Order: Sphacelariales
Family: Lithodermataceae
- Lithoderma fatiscens Areschoug
Family: Phaeostrophiaceae
- Phaeostrophion irregulare Setchell & N.L.Gardner Surf-loving false kelp
Family: Sphacelariaceae
- Battersia arctica (Harvey) Draisma, Prud'Homme & H.Kawai
- Battersia norrisii (Hollenberg) P.W.Gabrielson, S.C.Lindstrom & O'Kelly
- Battersia racemosa (Greville) Draisma, Prud'Homme & H.Kawai
- Chaetopteris plumosa (Lyngbye) Kützing
- Sphacelaria rigidula Kützing Brown sea moss
Family: Sphacelodermaceae
- Sphaceloderma caespitula (Lyngbye) Draisma, Prud'Homme & H.Kawai
Order: Stschapoviales
Family: Halosiphonaceae
- Halosiphon tomentosus (Lyngbye) Jaasund
Family: Platysiphonaceae
- Platysiphon glacialis (Rosenvinge) H.Kawai & T.Hanyuda
Order: Syringodermatales
Family: Syringodermataceae
- Microzonia abyssicola (Setchell & N.L.Gardner) Camacho & Fredericq
Order: Tilopteridales
Family: Tilopteridaceae
- Haplospora globosa Kjellman
Class: Xanthophyceae
Order: Vaucheriales
Family: Vaucheriaceae
- Vaucheria litorea C.Agardh
- Vaucheria longicaulis var. macounii Blum
Phylum: Rhodophyta
Class: Bangiophyceae
Order: Bangiales
Family: Bangiaceae
- "Bangia" spp. Black sea-hair
- Boreophyllum aestivale (S.C.Lindstrom & Fredericq) S.C.Lindstrom Summer laver
- Boreophyllum aleuticum S.C.Lindstrom & M.R.Lindeberg
- Boreophyllum ambiguum S.C.Lindstrom
- Fuscifolium papenfussii (V.Krishnamurthy) S.C.Lindstrom Eastern dark laver
- Fuscifolium tasa (Yendo) S.C.Lindstrom Western dark laver
- Porphyra purpurea (Roth) C.Agardh
- Pyropia abbottiae (V.Krishnamurthy) S.C.Lindstrom Black seaweed
- Pyropia fallax (S.C.Lindstrom & K.M.Cole) S.C.Lindstrom False laver
- Pyropia fucicola (V.Krishnamurthy) S.C.Lindstrom Rockweed laver
- Pyropia gardneri (G.M.Smith & Hollenberg) S.C.Lindstrom Kelp laver
- Pyropia kanakaensis (Mumford) S.C. Lindstrom
- Pyropia lanceolata (Setchell & Hus) S.C.Lindstrom
- Pyropia nereocystis (C.L.Anderson) S.C.Lindstrom Bull Kelp laver
- Pyropia perforata (J.Agardh) S.C.Lindstrom Purple laver
- Pyropia pseudolanceolata (V.Krishnamurthy) S.C.Lindstrom Olive green winter laver
- Pyropia taeniata S.C.Lindstrom Long laver
- Pyropia thulaea (Munda & P.M.Pedersen) Neefus
- Wildemania amplissima (Kjellman) Foslie Red cellophane
- Wildemania norrisii (V.Krishnamurthy) S.C.Lindstrom Norris' laver
- Wildemania variegata (Kjellman) De Toni Kjellman's laver
Class: Compsopogonophyceae
Order: Erythropeltidales
Family: Erythrotrichiaceae
- Erythrocladia irregularis Rosenvinge
- Erythrocladia polystromatica P.J.L.Dangeard
- Erythrotrichia carnea (Dillwyn) J.Agardh
- Porphyropsis coccinea (Areschoug) Rosenvinge
- Sahlingia subintegra (Rosenvinge) Kornmann
- Smithora naiadum (C.L.Anderson) Hollenberg Seagrass laver
Class: Florideophyceae
Order: Acrochaetiales
Family: Acrochaetiaceae
- Grania efflorescens (J.Agardh) Kylin
Family: Rhodochortonaceae
- Rhodochorton purpureum (Lightfoot) Rosenvinge Red sea moss
- Rhododrewia porphyrae (K.M.Drew) Clayden & G.W.Saunders
Order: Ahnfeltiales
Family: Ahnfeltiaceae
- Ahnfeltia fastigiata (Endlicher) Makienko Bushy ahnfelt's seaweed
Order: Bangiales
Family: Bangiaceae
- Pyropia kurogii (S.C.Lindstrom) S.C.Lindstrom Split spring laver
- Pyropia torta (V.Krishnamurthy) S.C.Lindstrom Teal nori
- Pyropia unabbottiae S.C.Lindstrom False black seaweed
Order: Bonnemaisoniales
Family: Bonnemaisoniaceae
- Bonnemaisonia californica Buffham
- Pleuroblepharidella japonica (Okamura) M.J.Wynne False sea brush
Order: Ceramiales
Family: Callithamniaceae
- Callithamnion acutum Kylin
- Callithamnion biseriatum Kylin
- Callithamnion pikeanum Harvey Beauty bush
Family: Ceramiaceae
- Antithamnion defectum Kylin Dwarf skein
- Antithamnionella pacifica (Harvey) E.M.Wollaston Hooked skein
- Campylaephora gardneri (Kylin) Barros-Baretto & Maggs
- Campylaephora kondoi (Yendo) Barros-Baretto & Maggs
- Campylaephora sungminbooi (Hughey & G.H.Boo) Barros-Baretto & Maggs
- Ceramothamnion pacificum (Collins) M.J.Wynne & C.W.Schneider Staghorn felt
- Herpochondria borealis (Ruprecht) Barros-Barreto & Maggs Coarse sea lace
- Hollenbergia subulata (Harvey) E.M.Wollaston
- Laingia aleutica M.J.Wynne
- Pterothamnion pectinatum (Kylin) Athanasiadis & Kraft
- Pterothamnion villosum (Kylin) Athanasiadis & Kraft
- Scagelia occidentalis (Kylin) E.M.Wollaston Scagel's skein
- Scagelia pylaisaei (Montagne) M.J.Wynne
- Symphyocladiella dendroidea (Montagne) D.Bustamante, B.Y.Won, S.C.Lindstrom & T.O.Cho
- Symphyocladiella gracilis (Kylin) D.Bustamante, B.Y.Won, S.C.Lindstrom & T.O.Cho
Family: Delesseriaceae
- Cryptopleura corallinara (Nott) N.L.Gardner
- Cryptopleura lobulifera (J.Agardh) Kylin
- Cryptopleura ruprechtiana (J.Agardh) Kylin Hidden rib
- Cumathamnion decipiens (J.Agardh) M.J.Wynne & G.W.Saunders Winged rib
- Dasya plumosum Harvey & Bailey
- Heterosiphonia densiuscula Kylin
- Hymenena flabelligera (J.Agardh) Kylin
- Hymenena multiloba (J.Agardh) Kylin
- Hymenena ruthenica (Postels & Ruprecht) Zinova
- Loranthophycus sp. Red feathered seaweed
- Membranoptera platyphylla (Setchell & N.L.Gardner) Kylin
- Membranoptera serrata (Postels & Ruprecht) Zinova
- Membranoptera spinulosa (Ruprecht) Kuntze Bering membrane wing
- Mikamiella dentata (M.J.Wynne) M.J.Wynne
- Mikamiella ruprechtiana (Zinova) M.J.Wynne Mikami's sea oak
- Myriogramme kjellmanianum Zinova
- Neoharaldiophyllum mirabile (Kylin) J.C.Kang & M.S.Kim
- Neoharaldiophyllum nottii (R.E.Norris & M.J.Wynne) J.C.Kang & M.S.Kim
- Neohypophyllum middendorffii (Ruprecht) M.J.Wynne
- Nienburgia sp. prolifera M.J.Wynne Northern toothed wing
- Nitophyllum cincinnatum I.A.Abbott
- Nitophyllum hollenbergii (Kylin) I.A.Abbott
- Nitophyllum plicatum Zinova
- Pantoneura juergensii (J.Agardh) Kylin
- Phycodrys amchitkensis M.J.Wynne
- Phycodrys fimbriata (Kuntze) Kylin Common sea oak
- Phycodrys setchellii Skottsberg
- Platysiphonia clevelandii (Farlow) Papenfuss
- Polyneura latissima (Harvey) Kylin Crisscross network
- Tokidadendron bullatum (N.L.Gardner) M.J.Wynne Northern sea oak
Family: Rhodomelaceae
- Beringiella labiosa M.J.Wynne
- Eutrichosiphonia paniculata (Montagne) D.E.Bustamante & T.O.Cho
- Harveyella mirabilis (Reinsch) Schmitz & Reinke
- Herposiphonia plumula (J.Agardh) Falkenberg
- Heterojanczewskia gardneri (Setchell & Guernsey) K.W.Nam
- Leachiella pacifica Kugrens
- Leptosiphonia brodiei (Dillwyn) Savoie & G.W.Saunders
- Melanothamnus akkeshiensis (Segi) Savoie & G.W.Saunders
- Neorhodomela aculeata (Perestenko) Masuda Graceful black pine
- Neorhodomela larix (Turner) Masuda Black pine
- Neorhodomela oregona (Doty) Masuda Oregon pine
- Odonthalia aleutica (C.Agardh) J.Agardh
- Odonthalia comosa (Setchell & N.L.Gardner) G.W.Saunders & C.W.Schneider Rockweed brush
- Odonthalia dentata (Linnaeus) Lyngbye
- Odonthalia floccosa (Esper) Falkenberg Sea brush
- Odonthalia kamtschatica (Ruprecht) J.Agardh Flattened sea brush
- Odonthalia lyallii (Harvey) J.Agardh
- Odonthalia setacea (Ruprecht) Perestenko Russian sea brush
- Odonthalia uniseriata Masuda & K.A.Miller
- Odonthalia washingtoniensis Kylin
- Osmundea spectabilis (Postels & Ruprecht) K.W.Nam Sea laurel
- Polysiphonia morrowii Harvey
- Polysiphonia pacifica var. determinata Hollenberg
- Polysiphonia pacifica var. disticha Hollenberg
- Polysiphonia pacifica var. pacifica Hollenberg Pretty polly
- Polysiphonia senticulosa Harvey
- Polysiphonia stricta (Dillwyn) Greville
- Polysiphonia villum J. Agardh
- Rhodomela sibirica Zinova & K.L.Vinogradova
- Rhodomela tenuissima (Ruprecht) Kjellman
- Rhodomela virgata Kjellman
- Savoiea bipinnata (Postels & Ruprecht) M.J.Wynne Black tassel
- Savoiea hamata (E.S.Zinova) M.J.Wynne Subtidal tassel
- Savoiea robusta (N.L.Gardner) M.J.Wynne
- Schizochlaenion rhodotrichum M.J.Wynne & R.E.Norris
- Vertebrata hendryi var. deliquescens
- Vertebrata hendryi var. gardneri
- Vertebrata hendryi var. hendryi (N.L.Gardner) Savoiea & G.W.Saunders
- Vertebrata hendryi var. luxurians
- Vertebrata woodii (Harvey) Kuntze
Family: Wrangeliaceae
- Griffithsia pacifica Kylin
- Pleonosporium kobayashii Okamura
- Pleonosporium pedicellatum S.C.Lindstrom, M.J.Wynne & N.I.Calvin
- Pleonosporium vancouverianum (J.Agardh) Setchell & N.L.Gardner Alternate skein
- Ptilota asplenioides (Esper) C.Agardh Sea fern
- Ptilota hypnoides Harvey
- Ptilota serrata Kützing Northern sea fern
- Ptilota tenuis Kylin
- Ptilothamnionopsis lejolisea (Farlow) P.S.Dixon
- Tiffaniella snyderae (Farlow) I.A.Abbott
- Tokidaea chilkatensis S.C.Lindstrom & M.J.Wynne Tokida's red felted skein
- Tokidaea serrata (M.J.Wynne) S.C.Lindstrom & M.J.Wynne
Order: Colaconematales
Family: Colaconemataceae
- Acrochaetium pacificum Kylin
- Colaconema amphiroae (K.M.Drew) P.W.Gabrielson
- Colaconema daviesii (Dillwyn) Stegenga
- Colaconema plumosum var. variabile (K.M.Drew) P.W.Gabrielson
- Colaconema rhizoideum (K.M.Drew) P.W.Gabrielson
Order: Corallinales
Family: Corallinaceae
- Bossiella cf. chiloensis vs. plumosa (Decaisne) H.W.Johansen
- Bossiella dichotoma (Manza) P.C.Silva
- Bossiella frondescens (Postels & Ruprecht) E.Y.Dawson Enigmatic coral seaweed
- Bossiella frondifera (Manza) P.W.Gabrielson, K.A.Miller, Martone & K.R.Hind
- Bossiella manzae P.W.Gabrielson, K.R.Hind & Martone
- Bossiella orbigniana (Decaisne) P.C. Silva
- Bossiella plumosa (Manza) P.C.Silva
- Bossiella reptans K.R.Hind, P.W.Gabrielson & Martone
- Bossiella schmittii (Manza) H.W.Johansen
- Calliarthron tuberculosum (Postels & Ruprecht) E.Y.Dawson
- Callilithophytum parcum (Setchell & Foslie) P.W.Gabrielson, W.H.Adey, G.P.Johnson & Hernández-Kantún
- Chamberlainium tumidum (Foslie) Caragnano, Foetisch, Maneveldt & Payri
- Chiharaea silvae (H.W.Johansen) Martone, S.C.Lindstrom, K.A.Miller & P.W.Gabrielson
- Corallina bathybentha E.Y.Dawson
- Corallina officinalis Linnaeus Chalky coral seaweed
- Corallina pilulifera Postels & Ruprecht
- Corallina vancouveriensis Yendo Graceful coral seaweed
- Corallina chilensis Decaisne
- Crusticorallina adhaerens K.R.Hind, Martone, C.P.Jensen & P.W.Gabrielson
- Crusticorallina muricata (Foslie) P.W.Gabrielson, Martone, K.R.Hind & C.P.Jensen
- Crusticorallina painei P.W.Gabrielson, K.R.Hind, G.W.Saunders, Martone & C.P.Jensen
- Johansenia macmillanii (Yendo) K.R.Hind & G.W.Saunders Macmillan's coral seaweed
- Pneophyllum zostericola (Foslie) D.Fujita
- Pseudolithophyllum whidbeyense (Foslie) Steneck & R.T.Paine
Order: Corallinales & Hapalidiales
Family: Corallinaceae & Hapalidiaceae
- Coralline crusts Calcareous crusts
Order: Gelidiales
Family: Gelidiaceae
- Gelidium purpurascens N.L.Gardner
- Pterocladiella caloglossoides (M.Howe) Santelices
Order: Gigartinales
Family: Cruoriaceae
- Cruoria pacifica Kjellman
Family: Cystocloniaceae
- Fimbrifolium dichotomum (Lepechin) G.I.Hansen
- Fimbrifolium spinulosum (Ruprecht) Perestenko
- Rhodophyllis aleutica M.J.Wynne
Family: Dumontiaceae
- Constantinea rosa-marina (S.G.Gmelin) Postels & Ruprecht Cup and saucer
- Constantinea simplex Setchell Simple saucer
- Constantinea subulifera Setchell Cracked saucer
- Cryptosiphonia woodii (J.Agardh) J.Agardh Bleached brunette
- Dilsea californica (J.Agardh) Kuntze California red blade
- Dilsea natashae (S.C.Lindstrom) G.W.Saunders & S.C.Lindstrom
- Dilsea socialis (Postels & Ruprecht) Perestenko
- Dumontia alaskana V.Tai, S.C.Lindstrom & G.W.Saunders Purple pencils
- Dumontia simplex Cotton Ephemeral spring tubes
- Farlowia mollis (Harvey & Bailey) Farlow & Setchell Farlow's seaweed
- Neodilsea borealis (I.A.Abbott) S.C.Lindstrom Northern red blade
- Orculifilum denticulatum S.C.Lindstrom
- Pikea cf. californica Harvey
- Thuretellopsis peggiana Kylin
- Weeksia coccinea (Harvey) S.C.Lindstrom
Family: Endocladiaceae
- Endocladia muricata (Endlicher) J.Agardh Black sea moss
- Gloiopeltis furcata (Postels & Ruprecht) J.Agardh Jelly moss
Family: Furcellariaceae
- Opuntiella californica (Farlow) Kylin Red Opuntia
- Opuntiella ornata (Postels & Ruprecht) Zinova
- Turnerella mertensiana (Postels & Ruprecht) F.Schmitz Red sea-cabbage
Family: Gigartinaceae
- Chondracanthus exasperatus (Harvey & Bailey) Hughey Turkish towel
- Mazzaella dewreedei G.W.Saunders & K.R.Millar
- Mazzaella oregona (Doty) Hughey, P.C. Silva & Hommersand
- Mazzaella parksii (Setchell & N.L.Gardner) Hughey, P.C.Silva & Hommersand Iridescent horn-of-plenty
- Mazzaella parvula (Kjellmann) P.W.Gabrielson, S.C.Lindstrom, Hughey & Hammersand Small northern mazza weed
- Mazzaella phyllocarpa (Postels & Ruprecht) Perestenko Northern mazza weed
- Mazzaella sanguinea (Setchell & N.L.Gardner) Hommersand
- Mazzaella splendens (Setchell & N.L. Gardner) Fredericq Splendid iridescent seaweed
- Mazzaella splendens subsp. fulgens (Setchell & N.L.Gardner) Hughey & Hommersand
Family: Gloiosiphoniaceae
- Gloiosiphonia capillaris (Hudson) Carmichael Red capillary seaweed
Family: Haemeschariaceae
- Haemescharia polygyna Kjellman
Family: Kallymeniaceae
- Beringia castanea Perestenko
- Callocolax acicularis M.J.Wynne & J.N.Heine
- Callophyllis spp. Red Sea fan
- Commanderella ruprechtianus (E.S.Zinova) Selivanova, Zhigadlova & G.W.Saunders
- Crossocarpus lamuticus Ruprecht
- Erythrophyllum delesserioides J.Agardh
- Euthora cristata (C.Agardh) J.Agardh Delicate northern sea fan
- Holey weed
- Hommersandia maximicarpa G.I.Hansen & S.C.Lindstrom Hommersand's seaweed
- Kallymeniopsis spp. Russian red blade
- Pugetia fragilissima Kylin
- Salishia firma (Kylin) Clarkston & G.W.Saunders
- Velatocarpus kurilensis Perestenko
- Velatocarpus pustulosus (Postels & Ruprecht) Perestenko
Family: Kallymeniaceae?
- Ugly weed
Family: Nemaliaceae
- Dudresnaya sp. False soft coral
Family: Phyllophoraceae
- Besa leptophylla (J.Agardh) M.S.Calderon & K.A.Miller
- Coccotylus hartzii (Rosenvinge) Le Gall & G.W.Saunders
- Coccotylus truncatus (Pallas) M.J.Wynne & J.N.Heine Arctic false Opuntiella
- Fredericqia decewii Maggs, Le Gall, Mineur, Provan & G.W.Saunders
- Mastocarpus alaskensis S.C.Lindstrom, Hughey & Martone Turkish washcloth
- Mastocarpus intermedius S.C.Lindstrom, Hughey & Martone
- Mastocarpus latissimus (Harvey) S.C.Lindstrom, Hughey & Martone Harvey's Turkish washcloth
- Mastocarpus pacificus (Kjellman) Perestenko Northern Turkish washcloth
- Mastocarpus rigidus S.C.Lindstrom, Hughey & Martone Narrow Turkish washcloth
- Mastocarpus spp. (Petrocelis phase) Tar spot alga
- Mastocarpus vancouveriensis S.C.Lindstrom, Hughey & Martone
- Stenogramma californicum Harvey
Family: sedis incertae
- Neoabbottiella araneosa (Perestenko) S.C.Lindstrom
Family: Solieriaceae
- Sarcodiotheca furcata (Setchell & N.L.Gardner) Kylin
- Sarcodiotheca gaudichaudii (Montagne) P.W.Gabrielson False sea spaghetti
Order: Gracilariales
Family: Gracilariaceae
- Gracilaria pacifica I.A.Abbott
- Gracilaria vermiculophylla (Ohmi) Papenfuss
Order: Halymeniales
Family: Halymeniaceae
- Cryptonemia obovata J. Agardh
- Grateloupia californica Kylin Spiny red bottlebrush
- Prionitis filiformis Kylin
- Prionitis sternbergii (C.Agardh) J.Agardh Bleachweed
Order: Hapalidiales
Family: Hapalidiaceae
- Boreolithothamnion lemoineae P.W.Gabrielson, Maneveldt, Hughey & V.Peña
- Boreolithothamnion phymatodeum (Foslie) P.W.Gabrielson, Maneveldt, Hughey & V.Peña
- Boreolithothamnion soriferum (Kjellman) P.W.Gabrielson, Maneveldt, Hughey & V.Peña Rhodoliths
- Clathromorphum circumscriptum (Strömfelt) Foslie
- Clathromorphum nereostratum Lebednik Thick rock crust
- Kvaleya epilaeve W.H.Adey & Sperapani
- Leptophytum adeyi Steneck & R.T.Paine
- Leptophytum foecundum (Kjellman) W.H.Adey
- Leptophytum laeve W.H.Adey
- Leptophytum tenue (Kjellman) Athansiadis & W.H.Adey
- Lithophyllum dispar (Foslie) Foslie
- Lithophyllum impressum Foslie
- Mesophyllum conchatum (Setchell & Foslie) W.H.Adey
- Mesophyllum lamellatum (Setchell & Foslie) W.H.Adey
- Mesophyllum vancouveriense (Foslie) Steneck & R.T.Paine
- Neopolyporolithon articum (Kjellman) P.W.Gabrielson, S.C.Lindstrom & Hughey Arctic coralline crust
- Neopolyporolithon reclinatum (Foslie) W.H.Adey & H.W.Johansen Coralline disc
- Phymatolithon calcareum (Pallas) W.H.Adey & D.L.McKibbin ex Woelkerling & L.M.Irvine
- Phymatolithon tenue (Rosenvinge) Düwel & Wegeberg
Order: Hildenbrandiales
Family: Hildenbrandiaceae
- Hildenbrandia occidentalis Setchell
- Hildenbrandia rubra (Sommerfelt) Meneghini Rusty rock
Order: Nemaliales
Family: Nemaliaceae
- Nemalion sp. Rubber threads
Family: Scinaiaceae
- Scinaia confusa (Setchell) Huisman
Order: Nemastomatales
Family: Schizymeniaceae
- Schizymenia pacifica (Kylin) Kylin Slippery red blade
Order: Palmariales
Family: Palmariaceae
- Devaleraea arctica (Zinova) Guiry
- Devaleraea callophylloides (M.W.Hawkes & Scagel) G.W.Saunders, C.J.Jackson & Salomaki Frilly red ribbon
- Devaleraea firma (Postels & Ruprecht) Selivanova Flattened sea sac
- Devaleraea mollis (Setchell & N.L.Gardner) G.W.Saunders, C.J.Jackson & Salomaki Red ribbon
- Halosaccion fucicola Postels & Ruprecht Sea sac
- Halosaccion glandiforme (S.G.Gmelin) Ruprecht High intertidal sea sac
- Halosaccion sp. undesribed Ephemeral sea sac
- Meiodiscus concrescens (K.M.Drew) P.W.Gabrielson
- Meiodiscus spetsbergensis (Kjellman) G.W.Saunders & McLachlan
- Neohalosacciocolax aleutica I.K.Lee & Kurogi
- Nothohalosaccion minjaii (I.K.Lee) Skriptsova
- Palmaria hecatensis M.W.Hawkes Stiff red ribbon
- Palmaria sp. Alaskan False Dulse
- Rubrointrusa membranacea (Magnus) Clayden & G.W.Saunders
Family: Rhodophysemataceae
- Rhodophysema elegans (P.Crouan & H.Crouan ex J.Agardh) P.S.Dixon
- Rhodophysema georgii Batters
- Rhodophysema kjellmanii G.W.Saunders & Clayden
- Rhodophysema nagaii Masuda
Order: Peyssonneliales
Family: Peyssonneliaceae
- Peyssonnelia pacifica Kylin
- Peyssonnelia rosenvingei F.Schmitz
Order: Plocamiales
Family: Plocamiaceae
- Plocamiocolax pulvinatus Setchell
- Plocamium pacificum Kylin Sea comb
- Plocamium tenue Kylin
Order: Rhodymeniales
Family: Champiaceae
- Fryeella gardneri (Setchell) Kylin
- Gloiocladia guiryi (Selivanova) Selivanova
- Gloiocladia laciniata (J.Agardh) N.Sanchéz & Rodríguez-Prieto
- Neogastroclonium subarticulatum (Turner) L.Le Gall, Dalen & G.W.Saunders
Family: Rhodymeniaceae
- Botryocladia hawkesii Filloramo & G.W.Saunders
- Lukinea dissecta Perestenko Northern fan
- Rhodymenia californica Kylin
- Sparlingia pertusa (Postels & Ruprecht) G.W.Saunders, I.M.Strachan & Kraft Red eyelet silk
Class: Florideopyhyceae
Order: Acrochaetiales
Family: Acrochaetiaceae
- Acrochaetium arcuatum (K.M.Drew) C.K.Tseng
- Acrochaetium kurogii (Y.P.Lee & S.C.Lindstrom) Y.P.Lee & I.K.Lee
- Acrochaetium microscopicum (Naegeli ex Kützing) Naegeli
Order: Ahnfeltiales
Family: Ahnfeltiaceae
- Ahnfeltia borealis D.Milstein & G.W.Saunders
Order: Ceramiales
Family: Ceramiaceae
- Antithamnionella floccosa (O.F.Müller) Whittick
- Antithamnionella shimamurana (M.Nagai) S.C.Lindstrom & P.W.Gabrielson
- Antithamnionella spirographidis (Schiffner) E.M.Wollaston
Family: Delesseriaceae
- Mikamiella hypophyllophila (M.J.Wynne) Guiry & M.J.Wynne
Family: Rhodomelaceae
- Amplisiphonia pacifica Hollenberg
Class: Stylonematophyceae
Order: Stylonematales
Family: Stylonemataceae
- Goniotrichopsis sublittoralis G.M.Smith
- Stylonema alsidii (Zanardini) K.M.Drew