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

hornwort-sporophyte

300px-Physcomitrella_Sporophyt

marchantia_archegoniophore-14A1897B01529E07629