Lab 12: Bryophytes : Mosses and Liverworts (and hornworts)

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Bryophytes • Plants without well developed vascular systems. • Sporophyte (diploid generation) is attached to and dependent on the gametophyte for the entire life cycle. • The gametophyte is the leafy part. The sprophyte is the spore bearing part. • Used to be one phyllum (Bryophyta). Now three: Bryophyta (mosses), Hepatophyta (liverworts), and Anthoceraphyta (hornworts)
Comparison of Moss and Liverwort Characteristics Mosses: Class Bryophyta • Gametophytes are leafy. • Sporophytes have capsules on the end of stalks (setae). Prepared by : Barbara Crandall-Stotler, Department of Plant Biology, Southern Illinois University, Carbondale, IL 62901-6509 Leafy liverworts: Class Jungermanniidae • Gametophytes have leaves without costa (midvein) • Leaves inserted at angle to stem. • Leaves in 2-3 rows. • Sporophyte has a transluscent stalk, capsule black and egg-shaped Thalloid liverworts: Class Marchantiophyta • Flat thallus • Umbrella-shaped structure on gametophyte is a carpocephalum. • Sporophyte is hidden under the carpocephallum. Photos: Natural perspective website:http://www.perspective.com/nature/plantae/bryophytes.html
Page 1: Lab 12: Bryophytes : Mosses and Liv
Page 5: Acrocarpous vs. pleurocarpous mosse
Page 8 and 9: Campylium stellatum (Hedw.) Lindb.
Page 10 and 11: Scorpidium scorpioides (Hedw.) Limp
Page 12 and 13: Aulacomnium palustre (Hedw.) Schwae
Page 14 and 15: Dicranum scoparium Hedw. Family: Di
Page 16 and 17: Ditrichum flexicaule (Schwaegr.) Ha
Page 18 and 19: Hylocomium splendens (Hedw.) B.S.G.
Page 20 and 21: Polytrichum strictum Brid. Family:
Page 22 and 23: Sphagnum characteristics Branches C
Page 24 and 25: Family: Splachnaceae Common Name: Y
Page 26 and 27: Ptilidium ciliare Family: Ptilidiac
Page 28: Marchantia polymorpha L. (slide 2 /

Lab 12: Bryophytes : Mosses and Liverworts (and hornworts)

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