Suprafamilial Arrangement of the Families of California Mosses (modified from Buck and Goffinet 2000). Genera with an asterisk (*) are not yet known from California despite occurrence in nearby states.
Class Sphagnopsida
Order Sphagnales
Family Sphagnaceae (Sphagnum)
Class Andreaeopsida
Order Andreaeales
Family Andreaeaceae (Andreaea)
Class Polytrichopsida
Order Tetraphidales
Family Tetraphidaceae (Tetraphis, Tetrodontium*)
Family Oedipodiaceae (Oedipodium*)
Family Buxbaumiaceae (Buxbaumia)
Order Polytrichales
Family Polytrichaceae (Atrichum, Bartramiopsis*, Meiotrichum, Oligotrichum*, Pogonatum, Polytrichastrum, Polytrichum)
Class Bryopsida
Subclass Funariidae
Order Timmiales
Family Timmiaceae (Timmia)
Order Encalyptales
Family Encalyptaceae (Encalypta)
Order Funariales
Family Funariaceae (Aphanorrhegma*, Entosthodon, Funaria, Physcomitrella, Physcomitrium, Pyramidula)
Family Disceliaceae (Discelium)
Family Gigaspermaceae (Lorentziella)
Subclass Dicranidae
Order Grimmiales
Family Grimmiaceae (Coscinodon, Grimmia, Jaffueliobryum, Racomitrium, Schistidium)
Family Ptychomitriaceae (Campylostelium*, Ptychomitrium)
Family Scouleriaceae (Scouleria)
Order Archidiales
Family Archidiaceae (Archidium)
Order Seligeriales
Family Seligeriaceae (Blindia, Brachydontium*, Seligeria)
Order Dicranales
Family Bryoxiphiaceae (Bryoxiphium*)
Family Fissidentaceae (Fissidens)
Family Dicranaceae (Arctoa, Atractylocarpus, Campylopodiella, Campylopus, Dichodontium, Dicranella, Dicranodontium*, Dicranum, Kiaeria, Orthodicranum, Paraleucobryum*)
Family Bruchiaceae (Bruchia, Trematodon)
Family Ditrichaceae (Ceratodon, Distichium, Ditrichum, Pleuridium, Trichodon)
Family Rhabdoweisiaceae (Amphidium, Cynodontium, Dichodontium, Dicranoweisia, Oncophorus)
Family Schistostegaceae (Schistostega*)
Order Pottiales
Family Pottiaceae (Acaulon, Aloina, Anoectangium*, Barbula, Bryoerythrophyllum, Crossidium, Crumia, Didymodon, Eucladium, Gymnostomum, Hennediella, Hymenostylium, Leptophascum, Microbryum, Molendoa, Oxystegus, Phascum, Plaubelia*, Pseudocrossidium,Pterygoneurum, Scopelophila, Stegonia, Syntrichia, Timmiella, Tortella, Tortula, Trichostomum, Triquetrella, Weissia)
Family Ephemeraceae (Ephemerum)
Subclass Bryidae
Superorder Bryanae
Order Splachnales
Family Splachnaceae (Splachnum*, Tayloria*, Tetraplodon*)
Family Meesiaceae (Leptobryum, Meesia)
Order Orthotrichales
Family Orthotrichaceae (Orthotrichum, Ulota, Zygodon)
Order Hedwigiales
Family Hedwigiaceae (Braunia*, Hedwigia, Pseudobraunia)
Order Bryales
Family Aulacomniaceae (Aulacomnium)
Family Bartramiaceae (Anacolia, Bartramia, Conostomum Philonotis, Plagiopus*)
Family Orthodontiaceae (Orthodontium)
Family Bryaceae (Anomobryum, Brachymenium, Bryum, Plagiobryum*)
Family Mniaceae (Epipterygium, Leucolepis, Mnium, Plagiomnium, Pohlia, Rhizomnium, Roellia)
Family Mielichhoferiaceae (Mielichhoferia, Schizymenium)
Superorder Hypnanae
Order Hookeriales
Suborder Hookeriinae
Family Hookeriaceae (Hookeria)
Order Hypnales
Family Amblystegiaceae (Amblystegium, Hygroamblystegium, Leptodictyum, Limbella*)
Family Cratoneuraceae (Cratoneuron)
Family Helodiaceae (Helodium, Palustriella)
Family Hylocomiaceae (Hylocomium, Pleurozium*, Rhytidiadelphus, Rhytidiopsis)
Family Rhytidiaceae (Rhytidium*)
Family Leskeaceae (Claopodium, Leptopterygynandrum, Lescuraea, Leskea, Pseudoleskeella)
Family Pterigynandraceae (Heterocladium, Iwatsukiella*, Myurella, Pterigynandrum)
Family Thuidiaceae (Thuidium*)
Family Campyliaceae (Calliergon, Campylium, Conardia, Drepanocladus, Hamatocaulis, Hygrohypnum, Pseudo-calliergon, Sanionia, Straminergon, Tomentypnum*, Warnstorfia)
Family Brachytheciaceae (Bestia, Brachythecium, Cirriphyllum*, Eurhynchium, Homalothecium, Isothecium, Kindbergia, Platyhypnidium, Pseudoscleropodium, Scleropodium, Steerecleus, Trachybryum)
Family Fabroniaceae (Fabronia)
Family Meteoriaceae (Meteorium*)
Family Plagiotheciaceae (Plagiothecium)
Family Fontinalaceae (Dichelyma, Fontinalis)
Family Climaciaceae (Climacium*)
Family Hypnaceae (Breidleria*, Buckiella, Calliergonella, Herzogiella, Homomallium, Hypnum, Isopterygiopsis, Isopterygium, Orthothecium*, Platydictya, Pseudotaxiphyllum, Ptilium* Tripterocladium, Vesicularia)
Family Sematophyllaceae (Sematophyllum)
Family Cryphaeaceae (Dendroalsia)
Family Leucodontaceae (Antitrichia, Pterogonium)
Family Neckeraceae (Bryolawtonia, Homalia, Metaneckera, Neckera, Porotrichum, Thamnobryum)
Family Leptodontaceae (Alsia)
Appendix II: Mosses of the states included in this work