Nonvascular Plants: Mosses, Liverworts, and Hornworts
Characteristics of Nonvascular Plants
Mosses, Liverworts, and Hornworts #
Classification of Nonvascular Plants
Division Bryophyta: Mosses
The Gametophyte Generation
Morphology
Water Transport
Development
Reproduction #
The Sporophyte Generation
Foot
Capsule
Seta
Operculum
Peristome Teeth
Calyptra
Metabolism and Ecology
Division Hepatophyta: Liverworts
The Gametophyte Generation
Leafy Liverworts
thallose liverworts
Thallus
Air pores
Antheridiophore
Archegoniophores
The Sporophyte Generation
Elaters
Division Anthocerotophyta: Hornworts
The Gametophyte Generation
The Sporophyte Generation
Hornworts #
small, inconspicuous thalloid plants
think along edges in center 4 to 5 cells thick, brittle
Foot embedded in gametophore tissue but no seta or sporangium
Special mucilage chamber present
zygote divides longitudinally after fertilization
embryophytes without vascular tissue
Bodies composed of parenchyma derived from 3-dimensional growth
Ubiquitous, perennial
Grow close together, tightly appressed and forming dense mounds
Hydroids
Leptoids
Rhizoids
innermost cortex conduct water and dissolved materials
elongate with relatively prominent interconnections
small multicellular trichome structures that penetrate surface of substrate
Protonema
lots of small chloroplasts
Antheridia
Archegonia
Where sperms produced
where eggs occur
small, bulbous tissue at bottom of archegonium
simple apical sporangium
narrow stalk b/w foot and sporangium
caplike lid
cell breakage forms complex teeth
layer of cells from neck of archegonium
smalls plants with alternation of heteromorphic generations
Jungermanniales and Haplomitriales
flat and ribbon like
body w/o roots, stems, and leaves
have no guard cells and can't be closed
umbrella shaped outgrowth
stalked with apex that have radiating fingers projecting outward and droop downward
single elongated cells with spring-shaped walls
Liver worts
Mosses
Hornworts
Anthocerotophyta
Hepatophyta
Bryophyta
