Fig' 25CO a, p' 448

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Fig. 25-CO (a), p. 448
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flowering plants
vascular plants (tracheophytes)
land plants (embryophytes)
seed plants (spermatophytes)
green plants (chlorobionta)
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gymnosperms naked seeds angiosperms
enclosed seeds (in fruits)
about 900 species
dominant land plants about 275,000 species
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Monocots
showy flowered
non-showy flowered commelinids
Lily group
Ginger group
Eudicots
Grass group
Alismatales
Palms
Magnoliids
Caryophyllids
Laurels
Rosids
single cotyledon
Asterids
Magnolias
Proteales
Peperomias
Ranunculales
Pipe vines
tricolpate pollen
Star anise group
Water lilies
Amborella
vessels (in addition to tracheids)
Living gymnosperms
double fertilization
fruit
flowers
Gnetophytes
Angiosperms
Conifers
Ginkgo
Cycads
Unknown gymnosperms
Fig. 25-CO (b), p. 448
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Angiosperms
ovules (? seeds) enclosed in ovaries (? fruits)
flowers
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carpels
seeds
carpel margins
Fig. 25-4c, p. 453
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Angiosperms
ovules in ovary
reduced gametophytes 2- to 3-nucleate male
g. 8-nucleate female g.
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plant (sporophyte)
stamen
carpel
Diploid (2 n)
pollen sacs of anther (microsporangium)
nucellus of ovule (megasporangium)
microsporocytes
megasporocytes
Meiosis
megaspores
microspores
pollen (young male gametophyte)
Pollination
Haploid ( n)
embryo sac (female gametophyte)
pollen tube (mature male gametophyte)
egg
cell
sperm
central cell
sperm
Double fertilization
zygote
primary endosperm cell
proembryo
Diploid (2 n)
embryo
endosperm
seed
plant (sporophyte)
Fig. 25-8, p. 458
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mitospores
fragments
ASEXUALCYCLES
sporophyte
embryo
mitosporangium
mitosis,growth
meiosporangium
zygote
Diploid (2n)
Karyogamy
Meiosis
SEXUAL CYCLE
Haploid (1n)
meiospores
n n cell
mitosis,growth
mitospores
Plasmogamy
ASEXUALCYCLES
fragments
gametophyte
gametes
mitosporangium
gametangia
Fig. 12-6, p. 190