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Organism
  Plantae
    Viridiplantae
     Streptophyta
     Embryophyta
      Tracheophyta
        Spermatophytina
            Magnoliopsida
                  Asteranae
                    Gentianales
                           [Rubiales]
                            Rubiaceae
                                   [Dialypetalanthaceae]
                                   [Theligonaceae]
                                     Adina
                                             Adina rubella
                                     Asperula
                                             Asperula arvensis
                                             Asperula ferganica
                                             Asperula glabrata
                                     Borreria
                                             Borreria laevis
                                             Borreria ocymoides
                                             Borreria pygmaea
                                             Borreria terminalis
                                     Canthium
                                             Canthium odoratum
                                     Casasia
                                             Casasia clusiifolia
                                     Cephaelis
                                             Cephaelis axillaris
                                     Cephalanthus
                                             Cephalanthus occidentalis
                                             Cephalanthus occidentalis var. occidentalis
                                     Chimarrhis
                                             Chimarrhis microcarpa
                                             Chimarrhis turbinata
                                     Chiococca
                                             Chiococca alba
                                             Chiococca alba ssp. parvifolia
                                             Chiococca parviflora
                                             Chiococca parvifolia
                                     Coccocypselum
                                             Coccocypselum hirsutum
                                     Coffea
                                             Coffea arabica
                                             Coffea liberica
                                     Coprosma
                                             Coprosma elliptica
                                             Coprosma kauensis
                                     Coptosapelta
                                             Coptosapelta diffusa
                                     Coussarea
                                             Coussarea racemosa
                                     Crucianella
                                             Crucianella angustifolia
                                             Crucianella exasperata
                                     Cruciata
                                             Cruciata pedemontana
                                     Diodia
                                             Diodia apiculata
                                             Diodia ocymifolia
                                             Diodia teres
                                             Diodia teres var. setifera
                                             Diodia virginiana
                                     Emmeorhiza
                                             Emmeorhiza umbellata
                                     Erithalis
                                             Erithalis fruticosa
                                     Ernodea
                                             Ernodea littoralis
                                     Exostema
                                             Exostema caribaeum
                  Galium
                  Galium buxifolium
                  Galium californicum
                  Galium californicum ssp. sierrae
                                     Gardenia
                  Gardenia brighamii
                                             Gardenia jasminoides
                  Gardenia mannii
                  Gardenia remyi
                                     Genipa
                                             Genipa americana
                                     Gouldia
                                             Gouldia axillaris
                                             Gouldia cerina
                                             Gouldia minima
                                     Guettarda
                                             Guettarda acreana
                                             Guettarda crispiflora
                                             Guettarda elliptica
                                             Guettarda scabra
                                     Hamelia
                                             Hamelia patens
                                     Hedyotis
                                             Hedyotis australis
                                             Hedyotis chrysotricha
                                             Hedyotis croftiae
                                             Hedyotis diffusa
                                             Hedyotis lancea
                                             Hedyotis longifolia
                                             Hedyotis longifolia var. ciliolata
                                             Hedyotis michauxii
                                             Hedyotis nigricans
                                             Hedyotis nigricans var. nigricans
                                             Hedyotis purpurea var. calycosa
                                             Hedyotis rosea
                                             Hedyotis schlechtendahliana var. schlechtendahliana
                                             Hedyotis terminalis
                                             Hedyotis uncinella
                                     Hillia
                                             Hillia parasitica
                                     Houstonia
                                             Houstonia caerulea
                                             Houstonia canadensis
                                             Houstonia lanceolata
                                             Houstonia longifolia
                                             Houstonia longifolia var. longifolia
                                             Houstonia longifolia var. tenuifolia
                                             Houstonia micrantha
                                             Houstonia montana
                                             Houstonia nigricans
                                             Houstonia procumbens
                                             Houstonia purpurea
                  Houstonia purpurea var. montana
                         [Hedyotis purpurea var. montana]
                                             Houstonia purpurea var. calycosa
                                             Houstonia purpurea var. purpurea
                                             Houstonia pusilla
                                             Houstonia rosea
                                             Houstonia serpyllifolia
                                             Houstonia tenuifolia
                                     Isertia
                                             Isertia coccinea
                                     Ixora
                                             Ixora arborea
                                             Ixora ferrea
                  Kadua
                  Kadua cookiana
                  Kadua cordata
                  Kadua cordata ssp. remyi
                  Kadua coriacea
                  Kadua degeneri
                  Kadua fluviatilis
                  Kadua haupuensis
                  Kadua laxiflora
                  Kadua parvula
                  Kadua st.-johnii
                                     Ladenbergia
                                             Ladenbergia macrocarpa
                                     Mitchella
                                             Mitchella repens
                  Mitracarpus
                  Mitracarpus maxwelliae
                  Mitracarpus polycladus
                                     Morinda
                                             Morinda umbellata
                                     Nertera
                                             Nertera granadensis
                                     Oldenlandia
                                             Oldenlandia boscii
                                             Oldenlandia corymbosa
                                             Oldenlandia tenuis
                                             Oldenlandia uniflora
                                     Paederia
                                             Paederia scandens
                                             Paederia scandens var. tomentosa
                                     Pinckneya
                                             Pinckneya bracteata
                                     Pomax
                                             Pomax umbellata
                                     Posoqueria
                                             Posoqueria latifolia
                  Psychotria
                  Psychotria grandiflora
                  Psychotria hexandra
                  Psychotria hexandra ssp. oahuensis
                  Psychotria malaspinae
                                     Richardia
                                             Richardia brasiliensis
                                             Richardia humistrata
                                             Richardia scabra
                                     Rondeletia
                                             Rondeletia parviflora
                                     Rubia
                                             Rubia cordifolia
                                             Rubia tinctorum
                                             Rubia truppeliana
                                     Rudgea
                                             Rudgea citrifolia
                                             Rudgea skutchii
                                     Sabicea
                                             Sabicea villosa
                                     Schradera
                                             Schradera exotica
                                     Serissa
                                             Serissa japonica
                                     Sherardia
                                             Sherardia arvensis
                                     Sipanea
                                             Sipanea pratensis
                                     Spermacoce
                                             Spermacoce assurgens
                                             Spermacoce floridana
                                             Spermacoce glabra
                                             Spermacoce ocymoides
                                             Spermacoce sintenisii
                                             Spermacoce tenuior
                                             Spermacoce tetraquetra
                                             Spermacoce verticillata
                                     Tammsia
                                             Tammsia anomala
                                     Uncaria
                                             Uncaria rhynchophylla