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Nonvascular Plants: Moses, Liveworts and Hornworts (Characterstics of…
Nonvascular Plants: Moses, Liveworts and Hornworts
Characterstics of Nonvascular Plants
embtyophytes that do not have vascular plants
have multicellular sporangia and gametangia
body comprised of true parenchyma derived from apical meristem
exclusively terristial
have life cycle with alteration of heteromorphic generations
sporophyte
large plants with leaves and roots
smaller, temporary and inconspicious
gametophyte
tiny, occur inside pollen grains and ovules
larger, prominent generation
do not grow to be large
Classification of Nonvascular Plants
Hepatophyta
liveworts
Bryophyta
mosses
Anthocerotophyta
hornworts
Division Bryophyta: Mosses
Gematophyte generation
morphology
gematophores grow close together
open and loose in plants that grow in cool wet areas
grow from an apical meristem
slender stem, little tissue differentiation
outer cell layer is not called epidermis, it is called cortex
Water Transport
hydroids
located in cortex
conduct water and dissolved minerals
usually in the family Polytrichaceae
mosses that lack hydroids
conduct water through exterior of stem by capillary action