write a short note on "classification of bryophytes"
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Bryophytes are classified under three classes: Hepaticae (Liverworts), Anthocerotae (Hornworts) and Musci (Mosses).
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Answer:
BRYOPHYTES ARE MAINLY CLASSIFIED INTO THREE CLASSES
1 HEPATICOPSIDA
2 Anthrocerotopsida
3 Bryopsida
1 HEPATICOPSIDA :
* Its common name is liverworts .
* Sex organ present on dorsal surface of thallus .
* Elaters is generally present .
* sporogenous tissue generally develops from endothecium .
* Exsmple : Riccia , Marvhantia , sphaerocarpus etc .
2 Antheroceropsida
* Its common name is hornworts .
* sex organ present on dorsal surface of thallus .
* Elaters : pseudoelaters are generally present in the capsule .
* sporogenous tissue generally develops from amphithecium and endothecium form sterile colume - lla .
* Example : Anthoceros , Megaceros , Notothylus etc .
Bryopsida
* Its common name is mosses .
* sex organ develops from the superficial cells at the apex of leafly gametophore .
* Elasters are absent .
* sporogenous tissue is generally develops from outer layer of endothecium . Inner layer forms sterile columella .
* Example : Funaria , sphagnum , polytrivhum .
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