Lab 12: Bryophytes : Mosses and Liverworts (and hornworts)
Lab 12: Bryophytes : Mosses and Liverworts (and hornworts)
Lab 12: Bryophytes : Mosses and Liverworts (and hornworts)
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Comparison of Moss<br />
<strong>and</strong> Liverwort<br />
Characteristics<br />
<strong>Mosses</strong>: Class Bryophyta<br />
• Gametophytes are leafy.<br />
• Sporophytes have capsules on the<br />
end of stalks (setae).<br />
Prepared by : Barbara Cr<strong>and</strong>all-Stotler, Department of<br />
Plant Biology, Southern Illinois University,<br />
Carbondale, IL 62901-6509<br />
Leafy liverworts: Class<br />
Jungermanniidae<br />
• Gametophytes have leaves without<br />
costa (midvein)<br />
• Leaves inserted at angle to stem.<br />
• Leaves in 2-3 rows.<br />
• Sporophyte has a transluscent stalk,<br />
capsule black <strong>and</strong> egg-shaped<br />
Thalloid liverworts: Class<br />
Marchantiophyta<br />
• Flat thallus<br />
• Umbrella-shaped structure on<br />
gametophyte is a carpocephalum.<br />
• Sporophyte is hidden under the<br />
carpocephallum.<br />
Photos: Natural perspective website:http://www.perspective.com/nature/plantae/bryophytes.html
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