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Chapter 20: Non-vascular Plants: Mosses, Liverworts, and Hornworts…
Chapter 20: Non-vascular Plants: Mosses, Liverworts, and Hornworts
Concepts
nonvascular plants "bryophytes"
Vascular cryptogams
spermatophytes
Characteristics of Nonvascular Plants
mosses
the pineapple family
"embryophytes"
Classification of Nonvascular Plants
Division Bryophyta: Mosses
The Gametophyte Generation
Morphology
gametophores
Water Transport
Hydroids
Leptoids
Rhizoids
Development
Protonema
produces many buds
Reproduction
antheridia
archegonia
The Sporophyte Generation
bulbous tissue called "foot"
Capsule
Seta
operculum
peristome teeth
calyptra
Metabolism and Ecology
smaller in size
low temperature
mosses can grow on hard surfaces since they do not have roots
Division Hepatophyta: Liverworts
The Gametophyte Generation
Leafy Liverworts and Thallose Liverworts
air pores
Thallus
Antheridiophore
Archegoniophores
The Sporophyte Generation
Elaters
Division Anthocerotophyta: Hornwarts
The Gametophyte Generation
always thin
three or four protonema cells are produced before the gametophore phase
not on surface instead a special mucilage chamber forms near the upper surface
The Sporophyte Generation
foot embedded in gametophore tissue but there is no seta or discrete sporangium
death factor is unknown
