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Seed Plants 1: Seed Plants Without Flowers ("Gymnosperms")…
Seed Plants 1: Seed Plants Without Flowers ("Gymnosperms")
Concepts
Figure 22-1a
Figure 22-1b
Figure 22-2
Lignophytes
monophyletic woody plants
Spermatophytes
seed plants
Manoxylic Wood
soft, spongy, parenchymatous wood
Pycnoxylic Wood
hard, strong wood with little parenchyma
Gymnosperms
naked ovules
Angiosperms
flowering plants
Division Progymnospermophyta: Progymnosperms
Progymnosperms
gave rise to conifers, cycads
now extinct
Evolution of Seeds
Integument
layer of tissue, projects it upward
Micropyle
a hole in the integument
Pollen Chamber
holding area
Figure 22-7
Divison Pteridospermophyta Seed Ferns
Seed Ferns
Upper Development Period
Figure 22-11
Division Coniferophyta: Conifers
Figure 22-12
Figure 22-13
Figure 22-14
figure 22-15
Long Shoots
where tiny paper leaves appear
Short Shoots
axils of long roots
long needle leaves
Simple Cones
pollen cones
single, short unbranched axis
Compound Cones
more complex
shoots with axillary buds
Cone Bracts
shorts axis bears leaves
Ovuliferous Scale
megasporophylls are fused laterally
Figure 22-18
Figure 22-19
Figure 22-21
Figure 22-23
Figure 22-24
Figure 22-25
Figure 22-27
