Classification of Bryophytes

Bryophyta (Gk bryon= moss, phyton=plant, represent a group of plants that includes liverworts, hornworts and mosses growing predominantly in amphibious environment. Bryophytes are classified into three classes namely Hepaticopsida, Antherocerotopsida and Bryopsida.
classification of bryophytes
Classification of Bryophytes
i Hepaticopsida:
Riccia hirta
  • Common name: liverworts
  • Gametophytic plant body: may be thallose or foliose. Aseptate rhizoids.
  • Sex organs: Present on dorsal surface of thallus.
  • Sporophyte or sporogonium: Differentiated into foot, seta and capsule.
  • Elaters: Generally present, absent in some like Riccia
  • Sporogenous tissue: Develops from endothecium
  • Dehisce of capsule: Irregular
  • Examples: Riccia, Marchantia, Sphaerocarpus
ii Anthocerotopsida:
Anthoceros formosae
  • Common name: hornworts
  • Gametophytic plant body: Thallose. Aseptate rhizoids.
  • Sex organs: Present on dorsal surface of thallus.
  • Sporophyte or sporogonium: foot, short meristematic region and capsule.
  • Elaters: Pseudoelaters are present in the capsule.
  • Sporogenous tissue: Develops from amphithecium and endothecium form sterile columella.
  • Dehisce of capsule: Irregular
  • Examples: Anthoceros, Megaceros, Notothylus
iii Bryopsida:
Funaria hygrometrica
  • Common name: Mosses
  • Gametophytic plant body: Thalloid protonema and leafy gametophore.Obliquely septate rhizoids.
  • Sex organs: Develop from the superficial cells at the apex of leafy gametophore.
  • Sporophyte or sporogonium:
  • Foot, seta and capsule.
  • Elaters: Absent
  • Sporogenous tissue: Develops from outer layer of endothecium. Inner layer forms sterile columella.
  • Dehisce of capsule: Regular
  • Examples: Funaria, Sphagnum, Polytrichum
Image credit: An excellent site for bryophyte images
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