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    Tracheophyta
           [Tracheobionta]
    Spermatophyta
      Magnoliophyta
             [Angiospermae]
         Eudicots
             Core Eudicots
               Rosids
               Fabids
                    Malpighiales
                            <b>Podostemaceae</b>
                                     <i>Anastrophea</i>
                                     <i>Angolaea</i>
                                             <i>Angolaea fluitans</i>
                                     <i>Apinagia</i>
                                             <i>Apinagia aripecuruensis</i>
                                             <i>Apinagia arminensis</i>
                                             <i>Apinagia batrachifolia</i>
                                                   [Oenone batrachifolia]
                                                   <i>Apinagia batrachifolia f. longistyla</i>
                                             <i>Apinagia boliviana</i>
                                             <i>Apinagia brevicaulis</i>
                                             <i>Apinagia corymbosa</i>
                                               <i>Apinagia corymbosa var. capillarifolia</i>
                                               <i>Apinagia corymbosa var. corymbosa</i>
                                             <i>Apinagia crispa</i>
                                             <i>Apinagia digitata</i>
                                             <i>Apinagia divaricata</i>
                                             <i>Apinagia exilis</i>
                                             <i>Apinagia flexuosa</i>
                                                   [Ligea flexuosa]
                                             <i>Apinagia fluitans</i>
                                             <i>Apinagia fucoides</i>
                                             <i>Apinagia gardneriana</i>
                                             <i>Apinagia glaziovii</i>
                                                   [Ligea glaziovii]
                                             <i>Apinagia guairaensis</i>
                                             <i>Apinagia guyanensis</i>
                                                   [Apinagia imthurnii]
                                             <i>Apinagia hulkiana</i>
                                             <i>Apinagia itanensis</i>
                                             <i>Apinagia kochii</i>
                                             <i>Apinagia latifolia</i>
                                             <i>Apinagia leptophylla</i>
                                             <i>Apinagia longifolia</i>
                                                   [Oenone longifolia]
                                             <i>Apinagia marowynensis</i>
                                             <i>Apinagia membranacea</i>
                                             <i>Apinagia multibranchiata</i>
                                             <i>Apinagia nana</i>
                                             <i>Apinagia peruviana</i>
                                             <i>Apinagia petiolata</i>
                                             <i>Apinagia pilgeri</i>
                                             <i>Apinagia platystigma</i>
                                             <i>Apinagia psyllophora</i>
                                             <i>Apinagia pusilla</i>
                                             <i>Apinagia pygmaea</i>
                                             <i>Apinagia rangiferina</i>
                                             <i>Apinagia richardiana</i>
                                             <i>Apinagia riedelii</i>
                                             <i>Apinagia ruppioides</i>
                                             <i>Apinagia secundiflora</i>
                                             <i>Apinagia spruceana</i>
                                             <i>Apinagia staheliana</i>
                                             <i>Apinagia surumuensis</i>
                                             <i>Apinagia tenuifolia</i>
                                             <i>Apinagia treslingiana</i>
                                             <i>Apinagia versteegiana</i>
                                             <i>Autana andersonii</i>
                                     <i>Aulea</i>
                                     <i>Autana</i>
                                     <i>Butumia</i>
                                             <i>Butumia marginalis</i>
                                     <i>Castelnavia</i>
                                             <i>Castelnavia fluitans</i>
                                                   [Castelnavia pusillima]
                                                   [Castelnavia serpens]
                                             <i>Castelnavia monandra</i>
                                             <i>Castelnavia multipartita</i>
                                                   [Castelnavia fimbriata]
                                             <i>Castelnavia noveloi</i>
                                             <i>Castelnavia pendulosa</i>
                                                   [Castelnavia multipartita f. pendulosa]
                                             <i>Castelnavia princeps</i>
                                                   [Castelnavia cuneifolia]
                                     <i>Ceratolacis</i>
                                             <i>Ceratolacis erythrolichen</i>
                                             <i>Ceratolacis pedunculatum</i>
                                     <i>Cipoia</i>
                                             <i>Cipoia inserta</i>
                                             <i>Cipoia ramosa</i>
                                     <i>Cladopus</i>
                                             <i>Cladopus austrosinensis</i>
                                             <i>Cladopus doianus</i>
                                             <i>Cladopus fallax</i>
                                             <i>Cladopus fukienensis</i>
                                             <i>Cladopus javanicus</i>
                                             <i>Cladopus nymanii</i>
                                             <i>Cladopus pierrei</i>
                                             <i>Cladopus queenslandicus</i>
                                             <i>Cladopus taiensis</i>
                                             <i>Cladopus yinggelingensis</i>
                                     <i>Crenias</i>
                                     <i>Cussetia</i>
                                             <i>Cussetia carinata</i>
                                             <i>Cussetia diversifolia</i>
                                     <i>Dalzellia</i>
                                             <i>Dalzellia angustissima</i>
                                             <i>Dalzellia attapeuensis</i>
                                             <i>Dalzellia ceylanica</i>
                                             <i>Dalzellia kailarsenii</i>
                                             <i>Dalzellia microphylla</i>
                                             <i>Dalzellia pseudoangustata</i>
                                             <i>Dalzellia ranongensis</i>
                                             <i>Dalzellia sparsa</i>
                                             <i>Dalzellia ubonensis</i>
                                             <i>Dalzellia zeylanica</i>
                                     <i>Devillea</i>
                                             <i>Devillea flagelliformis</i>
                                     <i>Diamantina</i>
                                             <i>Diamantina lombardii</i>
                                     <i>Dicraeanthus</i>
                                             <i>Dicraeanthus africanus</i>
                                                   [Dicraeanthus ramosus]
                                             <i>Dicraeanthus zehnderi</i>
                                     <i>Dicraeia</i>
                                     <i>Djinga</i>
                                             <i>Djinga cheekii</i>
                                             <i>Djinga felicis</i>
                                     <i>Endocaulos</i>
                                             <i>Endocaulos mangorense</i>
                                     <i>Farmeria</i>
                                             <i>Farmeria indica</i>
                                             <i>Farmeria metzgerioides</i>
                                     <i>Griffithella</i>
                                             <i>Griffithella hookeriana</i>
                                     <i>Hanseniella</i>
                                             <i>Hanseniella heterophylla</i>
                                             <i>Hanseniella smitinandii</i>
                                     <i>Heterotristicha</i>
                                             <i>Heterotristicha schroederi</i>
                                     <i>Hydrobryopsis</i>
                                             <i>Hydrobryopsis sessilis</i>
                                     <i>Hydrobryum</i>
                                             <i>Hydrobryum austrolaoticum</i>
                                             <i>Hydrobryum bifoliatum</i>
                                             <i>Hydrobryum chiangmaiense</i>
                                             <i>Hydrobryum floribundum</i>
                                             <i>Hydrobryum griffithii</i>
                                             <i>Hydrobryum japonicum</i>
                                             <i>Hydrobryum kaengsophense</i>
                                             <i>Hydrobryum khaoyaiense</i>
                                             <i>Hydrobryum koribanum</i>
                                             <i>Hydrobryum loeicum</i>
                                             <i>Hydrobryum luangnamtaense</i>
                                             <i>Hydrobryum mandaengensis</i>
                                             <i>Hydrobryum micrantherum</i>
                                               <i>Hydrobryum micrantherum var. crassum</i>
                                             <i>Hydrobryum minutale</i>
                                             <i>Hydrobryum phetchabunense</i>
                                             <i>Hydrobryum phurueanum</i>
                                             <i>Hydrobryum puncticulatum</i>
                                             <i>Hydrobryum ramosum</i>
                                             <i>Hydrobryum somranii</i>
                                             <i>Hydrobryum subcrustaceum</i>
                                             <i>Hydrobryum subcylindricum</i>
                                             <i>Hydrobryum taeniatum</i>
                                             <i>Hydrobryum takakioides</i>
                                             <i>Hydrobryum tardhuangense</i>
                                             <i>Hydrobryum varium</i>
                                             <i>Hydrobryum verrucosum</i>
                                             <i>Hydrobryum vientianense</i>
                                     <i>Hydrodiscus</i>
                                             <i>Hydrodiscus koyamae</i>
                                     <i>Indodalzellia</i>
                                             <i>Indodalzellia gracilis</i>
                                     <i>Indotristicha</i>
                                             <i>Indotristicha ramosissima</i>
                                             <i>Indotristicha tirunelveliana</i>
                                     <i>Jenmaniella</i>
                                     <i>Ledermanniella</i>
                                             <i>Ledermanniella abbayesii</i>
                                                   [Inversodicraea abbayesii]
                                             <i>Ledermanniella adamesii</i>
                                                   [Inversodicraea adamesii]
                                             <i>Ledermanniella aloides</i>
                                                   [Inversodicraea aloides]
                                             <i>Ledermanniella annithomae</i>
                                             <i>Ledermanniella batangensis</i>
                                                   [Inversodicraea batangensis]
                                             <i>Ledermanniella bifurcata</i>
                                                   [Inversodicraea bifurcata]
                                             <i>Ledermanniella boloensis</i>
                                             <i>Ledermanniella bosii</i>
                                             <i>Ledermanniella boumiensis</i>
                                             <i>Ledermanniella bowlingii</i>
                                                   [Inversodicraea bowlingii]
                                             <i>Ledermanniella congolana</i>
                                                   [Inversodicraea congolana]
                                             <i>Ledermanniella cristata</i>
                                             <i>Ledermanniella digitata</i>
                                                   [Inversodicraea digitata]
                                             <i>Ledermanniella fluitans</i>
                                                   [Inversodicraea fluitans]
                                             <i>Ledermanniella gabonensis</i>
                                             <i>Ledermanniella guineensis</i>
                                             <i>Ledermanniella harrisii</i>
                                             <i>Ledermanniella jaegeri</i>
                                             <i>Ledermanniella kamerunensis</i>
                                             <i>Ledermanniella keayi</i>
                                                   [Inversodicraea keayi]
                                             <i>Ledermanniella ledermannii</i>
                                             <i>Ledermanniella letestui</i>
                                                   [Inversodicraea letestui]
                                             <i>Ledermanniella letouzeyi</i>
                                             <i>Ledermanniella linearifolia</i>
                                             <i>Ledermanniella lunda</i>
                                             <i>Ledermanniella maturiniana</i>
                                             <i>Ledermanniella minutissima</i>
                                             <i>Ledermanniella monandra</i>
                                                   [Monandriella linearifolia]
                                             <i>Ledermanniella mortonii</i>
                                             <i>Ledermanniella musciformis</i>
                                                   [Inversodicraea musciformis]
                                             <i>Ledermanniella nicolasii</i>
                                             <i>Ledermanniella ntemensis</i>
                                             <i>Ledermanniella onanai</i>
                                             <i>Ledermanniella paulsitae</i>
                                             <i>Ledermanniella pollardiana</i>
                                             <i>Ledermanniella prasina</i>
                                             <i>Ledermanniella pusilla</i>
                                                   [Sphaerothylax pusilla]
                                             <i>Ledermanniella pygmaea</i>
                                             <i>Ledermanniella ramosissima</i>
                                             <i>Ledermanniella raynaliorum</i>
                                             <i>Ledermanniella sanagaensis</i>
                                             <i>Ledermanniella schlechteri</i>
                                                   [Dicraeia schlechteri]
                                                   [Inversodicraea tenuissima]
                                             <i>Ledermanniella taylorii</i>
                                                   [Inversodicraea pygmaea]
                                                   [Sphaerothylax pygmaea]
                                             <i>Ledermanniella tenax</i>
                                                   [Dicraeia tenax]
                                                   [Inversodicraea tenax]
                                             <i>Ledermanniella tenuifolia</i>
                                                   [Inversodicraea tenuifolia]
                                             <i>Ledermanniella tenuissima</i>
                                             <i>Ledermanniella thalloidea</i>
                                                   [Inversodicraea thalloidea]
                                             <i>Ledermanniella thollonii</i>
                                             <i>Ledermanniella torrei</i>
                                             <i>Ledermanniella variabilis</i>
                                                   [Inversodicraea variabilis]
                                             <i>Ledermanniella warmingiana</i>
                                                   [Sphaerothylax warmingiana]
                                             <i>Ledermanniella yiben</i>
                                     <i>Leiocarpodicraea</i>
                                     <i>Leiothylax</i>
                                             <i>Leiothylax callewaertii</i>
                                             <i>Leiothylax drummondii</i>
                                             <i>Leiothylax penicillioides</i>
                                             <i>Leiothylax quangensis</i>
                                                   [Dicraeia quangensis]
                                                   [Leiocarpodicraea buesgenii]
                                                   [Leiocarpodicraea edeensis]
                                             <i>Leiothylax sessilis</i>
                                     <i>Letestuella</i>
                                             <i>Letestuella tisserantii</i>
                                                   [Leiothylax warmingii]
                                                   [Letestuella chevalieri]
                                     <i>Ligea</i>
                                     <i>Lophogyne</i>
                                             <i>Lophogyne aeruginosa</i>
                                                   [Apinagia penicillata]
                                                   [Marathrum aeruginosum]
                                             <i>Lophogyne aripuanensis</i>
                                                   [Monostylis aripuanensis]
                                             <i>Lophogyne capillacea</i>
                                                   [Marathrum capillaceum]
                                                   [Monostylis capillacea]
                                             <i>Lophogyne ceratophylla</i>
                                                   [Jenmaniella ceratophylla var. ceratophylla]
                                                   [Jenmaniella ceratophylla var. hexandra]
                                                   [Jenmaniella ceratophylla var. parva]
                                                   [Jenmaniella ceratophylla]
                                             <i>Lophogyne divertens</i>
                                                   [Apinagia divertens]
                                                   [Jenmaniella divertens]
                                             <i>Lophogyne fimbriata</i>
                                                   [Jenmaniella fimbriata]
                                             <i>Lophogyne fimbrifolia</i>
                                                   [Apinagia fimbrifolia]
                                                   [Apinagia intermedia]
                                                   [Apinagia parvifolia]
                                             <i>Lophogyne goeldiana</i>
                                                   [Monostylis goeldiana]
                                             <i>Lophogyne isoetifolia</i>
                                                   [Jenmaniella isoetifolia]
                                             <i>Lophogyne lacunosa</i>
                                             <i>Lophogyne paraensis</i>
                                                   [Monostylis paraensis]
                                             <i>Lophogyne tridactylitifolia</i>
                                                   [Jenmaniella jenmanii]
                                                   [Jenmaniella tridactylitifolia]
                                                   [Marathrum jenmanii]
                                                   [Marathrum pauciflorum var. heterophyllum]
                                             <i>Lophogyne varians</i>
                                                   [Jenmaniella guianensis]
                                                   [Jenmaniella varians]
                                     <i>Macarenia</i>
                                     <i>Macropodiella</i>
                                             <i>Macropodiella cussetiana</i>
                                             <i>Macropodiella garrettii</i>
                                                   [Dicraeia garrettii]
                                                   [Inversodicraea garrettii]
                                             <i>Macropodiella hallaei</i>
                                             <i>Macropodiella hallei</i>
                                             <i>Macropodiella heteromorpha</i>
                                                   [Macropodiella mildbraedii]
                                                   [Sphaerothylax heteromorpha]
                                             <i>Macropodiella macrothyrsa</i>
                                                   [Inversodicraea macrothyrsa]
                                             <i>Macropodiella pellucida</i>
                                                   [Inversodicraea pellucida]
                                                   [Ledermanniella pellucida]
                                             <i>Macropodiella taylorii</i>
                                                   [Dicraeanthus taylorii]
                                     <i>Maferria</i>
                                             <i>Maferria indica</i>
                                     <i>Marathrum</i>
                                             <i>Marathrum azarensis</i>
                                             <i>Marathrum cheiriferum</i>
                                             <i>Marathrum cubanum</i>
                                             <i>Marathrum diversifolium</i>
                                             <i>Marathrum foeniculaceum</i>
                                                   [Marathrum allenii]
                                                   [Marathrum elegans]
                                                   [Marathrum leptophyllum]
                                                   [Marathrum minutiflorum f. diversifolium]
                                                   [Marathrum minutiflorum f. intermedium]
                                                   [Marathrum minutiflorum]
                                                   [Marathrum oxycarpum]
                                             <i>Marathrum haenkeanum</i>
                                             <i>Marathrum indifferens</i>
                                             <i>Marathrum modestum</i>
                                             <i>Marathrum pauciflorum</i>
                                             <i>Marathrum plumosum</i>
                                                   [Vanroyenella plumosa]
                                             <i>Marathrum pusillum</i>
                                             <i>Marathrum schiedeanum</i>
                                             <i>Marathrum squamosum</i>
                                             <i>Marathrum stenocarpum</i>
                                             <i>Marathrum striatifolium</i>
                                             <i>Marathrum tenue</i>
                                             <i>Marathrum trichophorum</i>
                                             <i>Marathrum utile</i>
                                     <i>Mniopsis</i>
                                     <i>Monandriella</i>
                                     <i>Monostylis</i>
                                     <i>Neolacis</i>
                                             <i>Neolacis peruviana</i>
                                     <i>Noveloa</i>
                                             <i>Noveloa coulteriana</i>
                                             <i>Noveloa longifolia</i>
                                     <i>Oenone</i>
                                     <i>Oserya</i>
                                             <i>Oserya biceps</i>
                                             <i>Oserya coulteriana</i>
                                             <i>Oserya longifolia</i>
                                             <i>Oserya minima</i>
                                             <i>Oserya perpusilla</i>
                                             <i>Oserya pilgeri</i>
                                             <i>Oserya sphaerocarpa</i>
                                     <i>Paleodicraeia</i>
                                             <i>Paleodicraeia imbricata</i>
                                     <i>Paracladopus</i>
                                             <i>Paracladopus chantaburiensis</i>
                                             <i>Paracladopus chiangmaiensis</i>
                              Podostemoideae
                                     <i>Inversodicraea</i>
                                             <i>Inversodicraea achoundongii</i>
                                             <i>Inversodicraea annithomae</i>
                                             <i>Inversodicraea bosii</i>
                                             <i>Inversodicraea botswana</i>
                                             <i>Inversodicraea boumiensis</i>
                                             <i>Inversodicraea cristata</i>
                                             <i>Inversodicraea gabonensis</i>
                                             <i>Inversodicraea harrisii</i>
                                             <i>Inversodicraea kamerunensis</i>
                                             <i>Inversodicraea ledermannii</i>
                                                   [Dicraeia ledermannii]
                                             <i>Inversodicraea mortonii</i>
                                             <i>Inversodicraea ntemensis</i>
                                             <i>Inversodicraea paulsitae</i>
                                             <i>Inversodicraea pepehabai</i>
                                             <i>Inversodicraea senei</i>
                                             <i>Inversodicraea tanzaniensis</i>
                                             <i>Inversodicraea thollonii</i>
                                                   [Podostemum thollonii]
                                             <i>Inversodicraea torrei</i>
                                     <i>Mourera</i>
                                             <i>Mourera alcicornis</i>
                                             <i>Mourera aspera</i>
                                                   <i>Mourera aspera f. minor</i>
                                             <i>Mourera elegans</i>
                                             <i>Mourera fluviatilis</i>
                                             <i>Mourera glazioviana</i>
                                             <i>Mourera monadelpha</i>
                                             <i>Mourera pennicillata</i>
                                             <i>Mourera schwackeana</i>
                                             <i>Mourera weddelliana</i>
                                     <i>Rhyncholacis</i>
                                             <i>Rhyncholacis apiculata</i>
                                             <i>Rhyncholacis applanata</i>
                                               <i>Rhyncholacis applanata var. laxipinnata</i>
                                             <i>Rhyncholacis brassicifolia</i>
                                             <i>Rhyncholacis brevistamina</i>
                                             <i>Rhyncholacis carinata</i>
                                             <i>Rhyncholacis clavigera</i>
                                                   [Macarenia clavigera]
                                             <i>Rhyncholacis coronata</i>
                                             <i>Rhyncholacis crassipes</i>
                                             <i>Rhyncholacis cristata</i>
                                             <i>Rhyncholacis dentata</i>
                                             <i>Rhyncholacis divaricata</i>
                                             <i>Rhyncholacis flagellifolia</i>
                                             <i>Rhyncholacis guyanensis</i>
                                             <i>Rhyncholacis hydrocichorium</i>
                                             <i>Rhyncholacis jenmanii</i>
                                                   <i>Rhyncholacis jenmanii f. dolichophylla</i>
                                                   <i>Rhyncholacis jenmanii f. laciniata</i>
                                             <i>Rhyncholacis linearis</i>
                                             <i>Rhyncholacis minima</i>
                                             <i>Rhyncholacis minor</i>
                                             <i>Rhyncholacis nitelloides</i>
                                             <i>Rhyncholacis nobilis</i>
                                             <i>Rhyncholacis oligandra</i>
                                             <i>Rhyncholacis palmettifolia</i>
                                               <i>Rhyncholacis palmettifolia var. rosea</i>
                                             <i>Rhyncholacis paulana</i>
                                             <i>Rhyncholacis penicillata</i>
                                             <i>Rhyncholacis squamosa</i>
                                             <i>Rhyncholacis squamulosa</i>
                                             <i>Rhyncholacis tenuifolia</i>
                                             <i>Rhyncholacis unguifera</i>
                                             <i>Rhyncholacis varians</i>
                                               <i>Rhyncholacis varians var. tricholoba</i>
                                     <i>Podostemum</i>
                                             <i>Podostemum abrotanoides</i>
                                             <i>Podostemum ceratophyllum</i>
                                                   [Podostemum ceratophyllum f. chondroides]
                                                   [Podostemum ceratophyllum var. circumvallatum]
                                             <i>Podostemum comatum</i>
                                                   [Podostemum dimorphum]
                                                   [Podostemum undulatum var. angustifolium]
                                                   [Podostemum undulatum]
                                             <i>Podostemum distichum</i>
                                                   [Podostemum atrichum]
                                             <i>Podostemum flagelliforme</i>
                                             <i>Podostemum irgangii</i>
                                             <i>Podostemum muelleri</i>
                                             <i>Podostemum ovatum</i>
                                             <i>Podostemum rutifolium</i>
                                               <i>Podostemum rutifolium subsp. ricciiforme</i>
                                               <i>Podostemum rutifolium subsp. rutifolium</i>
                                             <i>Podostemum saldanhanum</i>
                                                   [Mniopsis saldanhana]
                                             <i>Podostemum scaturiginum</i>
                                             <i>Podostemum subulatum</i>
                                             <i>Podostemum weddellianum</i>
                                                   [Crenias weddelliana]
                                     <i>Pohliella</i>
                                     <i>Polypleurum</i>
                                             <i>Polypleurum dichotomum</i>
                                             <i>Polypleurum disciforme</i>
                                             <i>Polypleurum elongatum</i>
                                             <i>Polypleurum erectum</i>
                                             <i>Polypleurum filifolium</i>
                                             <i>Polypleurum insulare</i>
                                             <i>Polypleurum longicaule</i>
                                             <i>Polypleurum longifolium</i>
                                             <i>Polypleurum longistylosum</i>
                                             <i>Polypleurum munnarense</i>
                                             <i>Polypleurum phuwuaense</i>
                                             <i>Polypleurum pleuricostatum</i>
                                             <i>Polypleurum prachinburiense</i>
                                             <i>Polypleurum prostratum</i>
                                             <i>Polypleurum rubroradicans</i>
                                             <i>Polypleurum schmidtianum</i>
                                             <i>Polypleurum sisaketense</i>
                                             <i>Polypleurum stylosum</i>
                                             <i>Polypleurum wallichii</i>
                                             <i>Polypleurum wongprasertii</i>
                                     <i>Saxicolella</i>
                                             <i>Saxicolella amicorum</i>
                                                   [Aulea amicorum]
                                             <i>Saxicolella flabellata</i>
                                                   [Pohliella flabellata]
                                             <i>Saxicolella laciniata</i>
                                                   [Pohliella laciniata]
                                             <i>Saxicolella marginalis</i>
                                             <i>Saxicolella nana</i>
                                             <i>Saxicolella submersa</i>
                                                   [Aulea submersa]
                                                   [Polypleurum submersum]
                                     <i>Sphaerothylax</i>
                                             <i>Sphaerothylax abyssinica</i>
                                                   [Anastrophea abyssinica]
                                                   [Dicraeia violascens]
                                                   [Inversodicraea monanthera]
                                                   [Leiocarpodicraea violascens]
                                                   [Leiothylax violascens]
                                                   [Sphaerothylax sanguinea]
                                             <i>Sphaerothylax algiformis</i>
                                                   [Sphaerothylax wageri]
                                             <i>Sphaerothylax sphaerocarpa</i>
                                                   [Leiocarpodicraea sphaerocarpa]
                                                   [Leiothylax sphaerocarpa]
                                     <i>Stonesia</i>
                                             <i>Stonesia fascicularis</i>
                                             <i>Stonesia ghoguei</i>
                                             <i>Stonesia gracilis</i>
                                             <i>Stonesia heterospathella</i>
                                             <i>Stonesia taylorii</i>
                                     <i>Terniopsis</i>
                                             <i>Terniopsis australis</i>
                                             <i>Terniopsis brevis</i>
                                             <i>Terniopsis chantaburiensis</i>
                                             <i>Terniopsis daoyinesis</i>
                                             <i>Terniopsis filiformis</i>
                                             <i>Terniopsis heterostaminata</i>
                                             <i>Terniopsis malayana</i>
                                             <i>Terniopsis microstigma</i>
                                             <i>Terniopsis minor</i>
                                             <i>Terniopsis ramosa</i>
                                             <i>Terniopsis savannaketense</i>
                                             <i>Terniopsis sessilis</i>
                                             <i>Terniopsis ubonensis</i>
                                             <i>Terniopsis vapyensis</i>
                                     <i>Thawatchaia</i>
                                             <i>Thawatchaia laotica</i>
                                             <i>Thawatchaia trilobata</i>
                                     <i>Thelethylax</i>
                                             <i>Thelethylax insolata</i>
                                             <i>Thelethylax isalensis</i>
                                             <i>Thelethylax minutiflora</i>
                                     <i>Tristicha</i>
                                             <i>Tristicha alternifolia</i>
                                             <i>Tristicha hypnoides</i>
                                             <i>Tristicha trifaria</i>
                                               <i>Tristicha trifaria subsp. pulchella</i>
                                                     [Tristicha hypnoides var. pulchella]
                                                     [Tristicha trifaria var. hypnoides]
                                                     [Tristichopsis riccioides]
                                               <i>Tristicha trifaria subsp. tlatlayana</i>
                                               <i>Tristicha trifaria subsp. trifaria</i>
                                                     [Tristicha alternifolia f. sambesiaca]
                                     <i>Tristichopsis</i>
                              Weddellinoideae
                                     <i>Weddellina</i>
                                             <i>Weddellina squamulosa</i>
                                                   <i>Weddellina squamulosa f. uaupensis</i>
                                     <i>Wettsteiniola</i>
                                             <i>Wettsteiniola accorsii</i>
                                             <i>Wettsteiniola apipensis</i>
                                             <i>Wettsteiniola pinnata</i>
                                     <i>Willisia</i>
                                             <i>Willisia arekaliana</i>
                                             <i>Willisia selaginoides</i>
                                     <i>Winklerella</i>
                                             <i>Winklerella dichotoma</i>
                                     <i>Zehnderia</i>
                                             <i>Zehnderia microgyna</i>
                                     <i>Zeylanidium</i>
                                             <i>Zeylanidium barberi</i>
                                             <i>Zeylanidium crustaceum</i>
                                             <i>Zeylanidium johnsonii</i>
                                             <i>Zeylanidium lichenoides</i>
                                             <i>Zeylanidium maheshwarii</i>
                                             <i>Zeylanidium olivaceum</i>
                                             <i>Zeylanidium subulatum</i>