Page 121 - Ultimate Visual Dictionary (DK)

LIVER WOR TS AND MOSSES
A COMMON MOSS MICROGRAPH OF MOSS SPORE LIFE-CYCLE OF MOSS
Branch of
Polytrichum commune Funaria hygrometrica Funaria sp.
conducting
tissue to “leaf”
Female rosette
“Stem” Cortex Male rosette (“leaves”
(“leaves” around around
archegonia)
antheridia)
Lateral
Main “stem” branch
of “stem”
Rhizoid
Epidermis Archegonium
(outer layer (female sex
of cells) GAMETOPHYTE organ)
Central strand Antherozoids
“Leaf” of conducting (male gametes)
tissue Epidermis released from
of capsule antheridium
Midrib
Antheridium
MICROGRAPH OF CROSS-SECTION (male sex organ)
THROUGH STEM AND LEAF
Remains of
SECTION THROUGH
SECTION THROUGH
Capsule Spore-containing spore-forming MATURE MALE APEX MATURE FEMALE APEX
Apophysis space tissue
(swollen area between Flagellum
seta and capsule) Columella
(central tissue Archegonium
Columella of capsule) Antherozoid (female sex
(central tissue (male gamete) organ)
of capsule) CROSS-SECTION swims to
THROUGH CAPSULE oosphere Oosphere (female
gamete) fertilized
Operculum by antherozoid
Beak (lid)
FERTILIZATION
Male apex
Calyptra (“leaves”
(hood surrounding
covering antheridia) Capsule Sporophyte
capsule) grows from
“Leaf” Seta fertilized
(stalk) oosphere
Seta
“Leaf” Gametophyte
(stalk) Young
aerial
“stem”
SPOROPHYTE
Capsule Apophysis
“Stem”
Seta
Operculum (stalk)
(lid)
Air space
Peristome Spores
tooth opens dispersed
RIPE CAPSULE
“Stem”
Young
gametophyte
Bud
Protonema
(branched
green filament) Spore
Rhizoid
EXTERNAL VIEW
DEVELOPING
OF MOSS
GAMETOPHYTE
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