#division_Bryophyta__Bryophyta  a division of nonflowering plants characterized by rhizoids rather than true roots and having little or no organized vascular tissue and showing alternation of generations between gamete-bearing forms and spore-bearing forms; comprises true mosses (Bryopsida) and liverworts (Hepaticopsida) and hornworts (Anthoceropsida)
  supertype:  division.phylum  (botany) taxonomic unit of plants corresponding to a phylum
  member of:  kingdom_Plantae
  member:  bryophyte__nonvascular_plant__nonvascularplant  any of numerous plants of the division Bryophyta
  member:  moss_family  a family of mosses
  member:  moss_genus  a genus of mosses
  member:  class_Anthoceropsida__Anthoceropsida  hornworts: in some classification systems included in the class Hepaticopsida
     member:  order_Anthocerotales__Anthocerotales  hornworts; liverworts having a thalloid gametophyte; in some classification systems included in the class Hepaticopsida
        member:  hornwort  liverworts with slender hornlike 2-valved capsules
     member:  family_Anthocerotaceae__Anthocerotaceae  hornworts
        member:  genus_Anthoceros__Anthoceros  hornworts
  member:  class_Bryopsida__Bryopsida__Musci__class_Musci  true mosses: bryophytes having leafy rather than thalloid gametophytes: comprises orders Andreaeales; Bryales; Dicranales; Eubryales; Sphagnales
     member:  order_Andreaeales__Andreaeales  comprises a single genus: Andreaea
        member:  genus_Andreaea__Andreaea  brown or blackish Alpine mosses having a dehiscent capsule with 4 longitudinal slits
     member:  order_Bryales__Bryales  category used in some classification systems for mosses having the spore case separated from the capsule wall by a hollow intercellular space
     member:  order_Dicranales__Dicranales  widely distributed order of mosses with erect gametophores and sporophytes at the tips of stems
        member:  family_Dicranaceae__Dicranaceae  mosses having costate leaves and long-stalked capsules with cleft peristome
           member:  genus_Dicranum__Dicranum  type genus of Dicranaceae
     member:  order_Eubryales__Eubryales  mosses with perennial erect gametophores and stems with rows of leaves and drooping capsules
        member:  family_Bryaceae__Bryaceae  a family of acrocarpous mosses
           member:  genus_Bryum__Bryum  type genus of the Bryaceae: mosses distinguished by mostly erect and tufted gametophytes and symmetrical short-necked capsules
        member:  family_Mniaceae__Mniaceae  family of erect mosses with club-shaped paraphyses and the hexagonal cells of the upper leaf surface; sometimes treated as a subfamily of Bryaceae
           member:  genus_Mnium__Mnium  mosses similar to those of genus Bryum but larger
     member:  order_Sphagnales__Sphagnales  coextensive with the genus Sphagnum; in some classifications isolated in a separate subclass
        member:  genus_Sphagnum  a large genus constituting the order Sphagnales: atypical mosses of temperate bogs with leaves that can hold much water
           member:  sphagnum_moss__sphagnum__peat_moss__bog_moss  any of various pale or ashy mosses of the genus Sphagnum whose decomposed remains form peat
  member:  class_Hepaticopsida__Hepaticopsida__Hepaticae__class_Hepaticae  liverworts: comprises orders Anthocerotales; Jungermanniales; Marchantiales; Sphaerocarpales
     member:  liverwort  any of numerous small green nonvascular plants of the class Hepaticopsida growing in wet places and resembling green seaweeds or leafy mosses
     member:  order_Jungermanniales__Jungermanniales  large order of chiefly tropical liverworts
        member:  leafy_liverwort__leafyliverwort__scale_moss  mosslike liverwort with tiny scalelike leaves; usually epiphytic
        member:  family_Jungermanniaceae__Jungermanniaceae  comprising the leafy members of the order Jungermanniales
     member:  order_Marchantiales__Marchantiales  liverworts with gametophyte differentiated internally
        member:  family_Marchantiaceae__Marchantiaceae  liverworts with prostrate and usually dichotomously branched thalli
           member:  genus_Marchantia__Marchantia  type genus of Marchantiaceae; liverworts that reproduce asexually by gemmae and have stalked antheridiophores
              member:  Marchantia_polymorpha__hepatica  a common liverwort
     member:  order_Sphaerocarpales__Sphaerocarpales  small order sometimes included in the order Jungermanniales
        member:  family_Sphaerocarpaceae__Sphaerocarpaceae  liverworts with bilaterally symmetrical gametophytes; sometimes placed in the order Jungermanniales
           member:  genus_Sphaerocarpus__Sphaerocarpus__Sphaerocarpos__genus_Sphaerocarpos  type genus of Sphaerocarpaceae; liverworts with small many-lobed usually orbicular thallus

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